Researchers are learning a lot about the intelligence and behavior of animals.
who have posed a threat, harassing them on-sight even months after their first encounter. But some of the smartest crows of all may be found in the animal physiology lab at the University of Tübingen in Germany. It’s there that the birds are mastering a skill you couldn’t manage until you were up to 4 years old: counting., researchers trained three crows to emit one to four caws in response to seeing the numbers 1, 2, 3, or 4 projected on a screen.
All of these studies and more have implications not just for our understanding of animals, but for our understanding of ourselves, as creatures with often-similar brain structures.
Animals, including homo sapiens, also play to practice combat, hunting, mating, and territorial claims, all of which are needed later in life. “That we see play in so many different species—including humans—tells us that it’s a really important component of our behavioral repertoire,” adds Harrington in an email to TIME. “We tend to see age differences, where younger individuals play more than older individuals.
“Our results do seem to indicate that ADHD-type traits occur together,” says Junttila. “We found that dogs with low inhibitory control were more impulsive, less trainable, and had higher activity levels. People with ADHD often have lower inhibitory control, impaired academic success, and higher impulsivity and hyperactivity.
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