The closest known deceased relatives of today’s humans were Neanderthals and Denisovans. A bone fragment, possibly belonging to a teenage girl, discovered in a Siberia by scientists uncovers the first found hybrid. DNA evidence confirms interbreeding, which was only hinted in previous genetic studies. Archeological digs revealed that Neanderthals and Denisovans lived in Eurasia, Neanderthal bones dating from 200,000 to 40,000 years old found mostly in western Eurasia and Denisovans bones dating from 200,000 to 30,000 years old discovered in eastern Eurasia
Archeologists discovered a fossil in 2012 in Denisova Cave, named “Denisova 11,” and researchers studied proteins removed from it and over 2,000 other fossils from Denisova Cave, which revealed the fragment came from a human. The thickness of the exterior of the fragment suggested that Denisova 11 belong to a girl, being at least 13 years old when she died, although radiocarbon dating suggested it was over 50,000 years old.
A new phenomenon like the aurora borealis called STEVE (Strong Thermal Emission Velocity Enhancement) is created by an electric field pointing poleward in the upper hemisphere and a magnetic field pointing downward, and they work together to make a drift going west. The ionosphere pulls solar particles to hit the neutral particles and they heat up, which makes the streaks of light.
Researchers first discovered STEVE after a Canadian Facebook group named the Alberta Aurora Chasers posted pictures of unusual vertical streaks of light in the sky, and they worked with the group to find out what conditions caused the phenomenon.
The Little Albert experiment was a renowned psychology experiment led by a behaviorist, John B. Watson, and a graduate student named Rosalie Rayner.
They conducted classical conditioning on a 9-month-old infant called Little Albert by presenting him with a white laboratory rat and paired it with a loud sound, to which he became afraid and instantly cried when the rat alone was presented to him after repeated loud noises associated with the rat, and conditioned him to be afraid of things with similarities to the rat (i.e., Santa Claus’ beard).
In conclusion, Albert was conditioned to have an emotional response when the rat or things similar in appearance were shown.