This 11 July 2019 video, recorded in Zambia, says about itself:
How Giraffe Spots Act Like a Natural Air Conditioner
The dark patches on a giraffe’s skin have more blood vessels than the light skin. This can help heat dissipate, allowing them to stay cool.
In a new Ethology study, researchers examined information on two adjacent giraffe populations in Kenya to determine whether human activities and high predation affect their social networks: here.