‘Asteroid, not volcanoes, killed dinosaurs’


This 2016 video says about itself:

How Asteroids Really Killed The Dinosaurs – Part 1 | Last Days of the Dinosaurs

In the clip from Last Days of the Dinosaur, we learn how the asteroids really killed the dinosaurs

Asteroid Day is celebrated every year on the 30th of June.

This 2016 video says about itself:

How Asteroids Really Killed The Dinosaurs – Part 2 | Last Day Of The Dinosaurs

Did you know that if the asteroid that wiped out the dinosaurs from the face of the Earth would have hit another location, they might still be alive? The shallow waters of the Gulf Of Mexico instantly vaporized as the asteroid hit, causing absolute destruction. This was the Last Day Of The Dinosaurs.

From Yale University in the USA:

In death of dinosaurs, it was all about the asteroid — not volcanoes

January 16, 2020

Volcanic activity did not play a direct role in the mass extinction event that killed the dinosaurs, according to an international, Yale-led team of researchers. It was all about the asteroid.

In a break from a number of other recent studies, Yale assistant professor of geology & geophysics Pincelli Hull and her colleagues argue in a new research paper in Science that environmental impacts from massive volcanic eruptions in India in the region known as the Deccan Traps happened well before the Cretaceous-Paleogene extinction event 66 million years ago and therefore did not contribute to the mass extinction.

Most scientists acknowledge that the mass extinction event, also known as K-Pg, occurred after an asteroid slammed into Earth. Some researchers also have focused on the role of volcanoes in K-Pg due to indications that volcanic activity happened around the same time.

“Volcanoes can drive mass extinctions because they release lots of gases, like SO2 and CO2, that can alter the climate and acidify the world,” said Hull, lead author of the new study. “But recent work has focused on the timing of lava eruption rather than gas release.”

To pinpoint the timing of volcanic gas emission, Hull and her colleagues compared global temperature change and the carbon isotopes (an isotope is an atom with a higher or lower number of neutrons than normal) from marine fossils with models of the climatic effect of CO2 release. They concluded that most of the gas release happened well before the asteroid impact — and that the asteroid was the sole driver of extinction.

“Volcanic activity in the late Cretaceous caused a gradual global warming event of about two degrees, but not mass extinction,” said former Yale researcher Michael Henehan, who compiled the temperature records for the study. “A number of species moved toward the North and South poles but moved back well before the asteroid impact.”

Added Hull, “A lot of people have speculated that volcanoes mattered to K-Pg, and we’re saying, ‘No, they didn’t.'”

Recent work on the Deccan Traps, in India, has also pointed to massive eruptions in the immediate aftermath of the K-Pg mass extinction. These results have puzzled scientists because there is no warming event to match. The new study suggests an answer to this puzzle, as well.

“The K-Pg extinction was a mass extinction and this profoundly altered the global carbon cycle,” said Yale postdoctoral associate Donald Penman, the study’s modeler. “Our results show that these changes would allow the ocean to absorb an enormous amount of CO2 on long time scales — perhaps hiding the warming effects of volcanism in the aftermath of the event.”

The International Ocean Discovery Program, the National Science Foundation, and Yale University helped fund the research.

Solar eclipse in Middle East, Asia


This 26 December 2019 video says about itself:

‘Ring of fire’ solar eclipse over the Middle East and Asia

An annular solar eclipse was visible on December 26, 2019 in the Middle East and Asia along a 118-kilometre wide path. The rare “ring of fire” could be seen from countries including Saudi Arabia, Oman, India, Sri Lanka, Malaysia, Singapore, Indonesia and the Philippines.

Space discoveries in 2019


This 17 June 2019 video says about itself:

Space is amazing. Over the years, NASA’s revealed some unusual mysteries about it. Lets find out amazing the most amazing recent discoveries made in space!

By Maria Temming, December 23, 2019 at 7:00 am:

How 2019’s space missions explored distant worlds

Planets, asteroids and Arrokoth were the focus of new discoveries

From asteroids to exoplanets, spacecraft are leaving no space rock unturned. While agencies in China, India and Israel made headlines with missions to the moon, here are some other places that space probes scouted in 2019.

Zoom and enhance

Touring Pluto in 2015 may have been New Horizons’ main event (SN: 12/26/15, p. 16), but flying by what used to be called Ultima Thule was an awesome encore. The space probe zipped by this Kuiper Belt object, now called Arrokoth, on New Year’s Day (SN Online: 12/30/18). Scientists were on the edge of their seats as the probe snapped pictures and sent higher- and higher-resolution images over several weeks, revealing the visage of Arrokoth to look like an elongated blob, then a snowman and finally a pair of lumpy pancakes (SN: 3/16/19, p. 15). Uncovering the origins of Arrokoth’s awkward shape may lend insight into the early stages of planet formation (SN: 4/13/19, p. 11).

I spy exoplanets

NASA’s Transiting Exoplanet Survey Satellite, or TESS, racked up eight exoplanet finds in its first few months of observation (SN: 2/2/19, p. 12). That initial cache included some weirdos, such as a planet that is about as dense as pure water and a “lava world” known as LHS 3844b that sizzles at about 540° Celsius. TESS has since discovered a new type of exoplanet called an ultrahot Neptune, which appears to be a fluffy gas giant in the process of stripping down to its rocky core (SN: 8/31/19, p. 11).

Asteroids to go

The Japan Aerospace Exploration Agency’s Hayabusa2 is expected to become the second spacecraft ever to bring a bit of asteroid back to Earth, after the original Hayabusa probe returned with a souvenir from the asteroid Itokawa in 2010. Hayabusa2 touched down on the asteroid Ryugu in February to fetch a sample from the asteroid’s surface (SN Online: 2/22/19). Then, to get a deeper sample, Hayabusa2 fired a copper projectile at Ryugu to punch a crater into the asteroid (SN Online: 4/5/19). The probe then ducked down to snag some rubble excavated from the interior (SN: 8/17/19, p. 14). Scientists won’t know exactly how much of Ryugu was collected until Hayabusa2, which started its journey home on November 13, arrives at Earth in late 2020.

Another sample-return mission, NASA’s OSIRIS-REx, is still orbiting its asteroid. When the spacecraft first arrived at Bennu in December 2018, observations unveiled a rugged surface littered with boulders — bad news for a probe designed to navigate more beachlike terrain (SN: 4/13/19, p. 10). Using OSIRIS-REx’s detailed mapping of Bennu from orbit, NASA selected a site for sample collection in the asteroid’s northern hemisphere (SN Online: 12/12/19). Bits of Bennu, to be returned in 2023, may reveal whether a similar asteroid could have delivered to early Earth a molecular starter pack for life (SN: 1/19/19, p. 20).

Meanwhile, on Mars

InSight arrived on the Red Planet in November 2018, and the rookie lander may have already captured the first recording of a Marsquake (SN Online: 4/23/19). Unlike tremors on Earth, underground rumblings on Mars are thought to result from the planet contracting as it cools. Studying such seismic signals could help scientists better understand the structure of Mars’ deep interior.

While InSight had its ear to the ground, the veteran Curiosity rover was measuring the consistency of a Martian mountain (SN Online: 1/31/19). As Curiosity scaled Mount Sharp, accelerometer readings indicated surprisingly loose rock beneath the rover’s wheels — suggesting that winds formed the mountain by sweeping sediment into a giant pile.

HG Wells, Attenborough, Martians and Tasmanian genocide


BRITISH MADE GENOCIDE: The last four Tasmanian Aborigines of solely Aboriginal descent c1860s. Truganini, the last to survive, is seated at far right

This photo shows the last four Tasmanian Aborigines of solely Aboriginal descent c1860s. Truganini, the last to survive, is seated at far right.

By Peter Frost in Britain:

Friday, December 6, 2019

Alien invasions and meetings with Stalin

The BBC TV adaptation of HG Wells’s War of the Worlds has finished. PETER FROST reminds us what a great socialist the author was

LAST SUNDAY saw the screening of the third and final episode of the BBC’s magnificent, if controversial, adaptation of HG Wells’s War of the Worlds.

Wells’s classic tale of Martians invading Earth has long been a favourite of mine. It is a beautifully ironic analogy of British imperialism’s invasions of foreign lands. Gun in one hand, a bible in the other the British invaded so many places in order to colour the globe pink.

Soldiers and missionaries carried a whole arsenal of fatal secret weapons. Viruses and bacteria of diseases like influenza and even the common cold. These were endemic back home but unknown and deadly among folk who had never built up immunities to them.

By coincidence before I watched the first episode of War of the Worlds I watched David Attenborough’s Seven Worlds, One Planet documentary on the animals of Australia.

Attenborough focussed on two Tasmanian species. The Tasmanian devil (Sarcophilus harrisii) is a carnivorous marsupial. Once widespread, today it is fighting hard in just a few Tasmanian locations to avoid total extinction.

He also showed amazing black and white footage of the very last Tasmanian tiger, or Tasmanian wolf. The Thylacine, (Thylacinus cynocephalus), was a marsupial wolf and the largest carnivorous marsupial of recent times. That film showed the very last survivor in a private Hobart zoo before the species became totally extinct in 1936.

The documentary however didn’t mention another Tasmanian species that was wiped out by the arrival of the white man. They were the indigenous people of the island — the Tasmanians — a population of Aboriginal people known as the Palawa.

It was the tragic fate of the Palawa that inspired HG Wells to write War of the Worlds. Wells told his brother Frank about the catastrophic effect of the British invasion on indigenous Tasmanians. What would happen, he wondered, if Martians did to Britain what the British had done to the Tasmanians?

So what of the BBC adaptation? I’ll leave most of that to TV reviewers more erudite than me. One widespread complaint was that the BBC adapters had added — horror of horrors — a woman hero.

The series opened with a hero, a journalist called George having left his wife, his cousin, to live with a woman called Amy in a small cottage called Lyndon near Woking, Surrey. Not one fact of the above can be found anywhere in the original book.

However H George Wells, a journalist, did marry his cousin and left her to live with a woman called Amy in a cottage called Lynton in Woking, Surrey.

It was at Lynton that Wells wrote the book and set the start of the Martian invasion in the countryside around the cottage.

What I want to do here is to remind readers what an incredible man HG Wells was. He always described himself as a committed socialist and wrote a wide variety of political writings — pamphlets, political books, newspaper and magazine articles — as well as novels and stories.

He was never afraid to use his novels and stories to advance his political opinions. Wells saw that socialism would abolish class barriers and foster equality of opportunity. Other writers such as Virginia Woolf berated him for using the novel as a vehicle for delivering his political ideas.

His novels took up diverse individual political issues. For instance The Island of Dr Moreau (1896) examined the fierce debates over vivisection. Ann Veronica (1909) deals with the struggle of the suffragettes for the vote for women.

In his Experiment in Autobiography (1934), he explained his political thinking was motivated by an awareness of the “incompatibility of the great world order foreshadowed by scientific and industrial progress with the existing political and social structures.”

For him the question was: how could politics and society catch up with the advances of science and technology? How could social and political institutions become more scientific, more efficient, more ordered?

As early as 1905 he described his ideal socialist society in his book A Modern Utopia. In it he paints a picture of a highly regulated world state where all property is state-owned, and where sexes are equal.

The Fabian Society were keen to have Wells on board. Despite some earlier differences with George Bernard Shaw and Beatrice and Sidney Webb he accepted an invitation to join the Fabians in 1903.

It would not be a happy time for the Fabians. They quickly realised that Wells could be a loose cannon. Openly criticising the Fabians from the beginning, in 1906 he shocked them with a paper called, unambiguously, The Faults of the Fabian.

In the paper Wells called the Fabian Society a talking shop for middle-class socialists, which lacked the appetite for real change. He argued Fabians should aim for mass membership and more radical reforms.

Wells’s love life and his reputed advocacy of free love didn’t go down well either. When In 1908 he advocated a wage for all mothers and the Fabians refused to adopt this as a policy, he left.

What Wells wanted was a single, socialist world state, a great world order, and it was no doubt to study this kind of development that he visited and championed the young Soviet Union repeatedly.

Wells visited Russia in 1914, 1920 and 1934. During his second visit his old friend and fellow writer Maxim Gorky arranged for him to meet and talk with Vladimir Lenin.

In July 1934, on his third visit to what had become the Soviet Union, he interviewed Joseph Stalin for the New Statesman. The interview lasted three hours.

He told Stalin how he had seen “the happy faces of healthy people” in contrast with his previous visit to Moscow in 1920 but he also raised some serious criticisms. Stalin, we are told, enjoyed the conversation.

During the second world war, Wells drafted a Universal Rights of Man that was published in the Times. This document and the advocacy he did around it led to the development of the Universal Declaration of Human Rights in 1948.

Wells was nominated for the Nobel Prize in Literature four times but never won.

He suffered for much of his life from diabetes and in 1934 co-founded the charity The Diabetic Association known today as Diabetes UK.

Winston Churchill was an avid reader of his books, and after they first met in 1902 they kept in touch until Wells died in 1946. Prime minister Churchill famously described the rise of Nazi Germany as “the gathering storm”. He actually took the phrase from War of the Worlds.

War of the Worlds has never been out of print since its original publication in 1897. Films, radio dramas, comic-books, video games, and many television series have been based on it.

The most famous, or infamous, adaptation is the 1938 radio broadcast by Orson Welles. Presented as a live, realistic set of news bulletins interrupting normal programming, supposedly terrified listeners had heart attacks and even committed suicide, though recent scholarship has suggested this is an urban myth.

Perhaps the greatest and most surprising tribute to the author and the book is that of Robert Goddard, the father of American rocketry. Goddard says his interest in rockets and space travel was first inspired by reading War of the Worlds aged sixteen.

Goddard would invent both liquid fuelled and multi-stage rockets that put men on the Moon and sent robotic probes to Mars — HG Wells would have wanted no finer tribute.

Ultimate Thule minor planet renamed Arrokoth


Arrokoth appears as a ruddy deformed snowman in this composite image acquired by NASA’s New Horizons spacecraft as it sped past on January 1, 2019. NASA, Johns Hopkins University Applied Physics Laboratory, Southwest Research

By Christopher Crockett, 13 November 2019:

NASA gave Ultima Thule a new official name

The far-flung solar system body is now Arrokoth, the Powhatan word for ‘sky’

Ultima Thule is no more. The remote solar system body visited in January by NASA’s New Horizons spacecraft now has a proper name: Arrokoth.

The word means “sky” in the language of the Powhatan people, a Native American tribe indigenous to Maryland. The state is home to New Horizons mission control at the Johns Hopkins University Applied Physics Laboratory in Laurel.

“We wanted to honor Maryland as our mission epicenter, and the idea of using a Native American language from there just bubbled up,” says Alan Stern, head of the New Horizons mission and a planetary scientist at the Southwest Research Institute in Boulder, Colo. “Tying it to our mission by using the word ‘sky’ completed the trifecta.”

NASA announced the name change on November 12, with the consent of Powhatan tribal elders and the International Astronomical Union, the organization of astronomers who, in part, oversee celestial naming conventions.

Arrokoth (pronounced AR-uh-koth), a flattened two-lobed body in the Kuiper Belt of icy worlds beyond Neptune, has been through a couple of names already. Up until now, its official designation had been 2014 MU69. In March 2018, the team landed on the nickname Ultima Thule, a Latin phrase that signifies a place beyond the known world.

“[Ultima Thule] was, as we said, always a placeholder we would discard once we did the flyby,” Stern says. That moniker came under almost immediate criticism after Newsweek noted that the phrase had also been appropriated by the Nazis as the mythical homeland of the Aryan race.

The New Horizons spacecraft — originally sent to check out Pluto and its retinue of moons (SN: 7/26/15) — is still transmitting data from its January 1 flyby of Arrokoth (SN: 1/2/19) and will continue to do so for at least another year, Stern says. By then, the team will have begun hunting for a possible third target, a search they can’t start until Earth gets to the other side of the sun next summer and New Horizons once again becomes visible at night to telescopes.

Hygiea, a new dwarf planet?


This 28 October 2019 video says about itself:

A computer simulation shows how a head-on collision between two objects in the asteroid belt more than 2 billon years ago could have formed Hygiea, along with thousands of much smaller companion asteroids. After the impact initially obliterated Hygiea’s parent body, most of the fragments clumped back together into Hygiea, and the strength of their collective gravity molded them into the nearly round dwarf planet seen today.

By Maria Temming in Science News, October 28, 2019, at 12:00 pm:

The solar system may have a new smallest dwarf planet: Hygiea

New images reveal the wee world is round, a final criterion for dwarf planet status

The asteroid belt object known as Hygiea may be the new baby of the dwarf planet family.

Hygiea, currently classified as an asteroid, already met three of four requirements for dwarf planet status: It orbits the sun. It isn’t a moon. And it hasn’t swept its orbital path clear of other space rocks, the way fully-fledged planets are able to. Now, new telescope images reveal that Hygiea is nearly spherical, which checks the last box to qualify as a dwarf planet.

If officially reclassified by the International Astronomical Union, Hygiea would join the handful of dwarf planets, including Pluto, in our solar system (SN: 5/25/18). About 430 kilometers across, Hygiea would unseat Ceres, with its 950-kilometer diameter, as the smallest dwarf planet discovered in our solar system, researchers report online October 28 in Nature Astronomy.

High-resolution images from the Very Large Telescope in Chile confirmed that Hygiea is about as round as Ceres — and that its surface isn’t marred by a huge impact basin. That was a surprise for the researchers, led by astronomer Pierre Vernazza of the Laboratoire d’Astrophysique de Marseille in France. They had expected to see an enormous crater from a collision billions of years ago that formed Hygiea’s entourage of over 6,800 small asteroids. By comparison, the asteroid Vesta sports a huge scar from the formation of its own, smaller asteroid swarm.

Computer simulations run by Vernazza’s team offer a possible explanation: More than 2 billion years ago, a space rock about 100 kilometers across completely shattered Hygiea’s parent body. When most of the remnants clumped back together into the space rock now known as Hygiea, they formed the smooth, spherical body seen today. By contrast, Vesta — about three times as massive as Hygiea and struck by 65-kilometer object — merely had some of its material carved out, leaving behind a big divot.