Understanding Smooth Eye Pursuit: The Incredible Targeting System Of Human Vision:
Researchers at the University of Pennsylvania have shed new light on how the brain and eye team up to spot an object in motion and follow it, a classic question of human motor control. The study shows that two distinctly different ways of seeing motion are used - one to catch up to a moving object with our eyes, a second to lock on and examine it.
Wolves Of Alaska Became Extinct 12,000 Years Ago, Scientists Report:
The ancient gray wolves of Alaska became extinct some 12,000 years ago, and the wolves in Alaska today are not their descendents but a different subspecies, an international team of scientists reports in the July 3 print edition of the journal Current Biology.
Reap What Your Ancestors Sowed: Cheating Has Long-term Consequences In Evolution Of Cooperation:
Freeloaders can live on the fruits of the cooperation of others, but their selfishness can have long-term consequences, reports an evolutionary biologist from The University of Texas at Austin in a new study.
Altruistic Rats: First Evidence For Generalized Reciprocal Cooperation In Non-humans:
Cooperation in animals has long been a major focus in evolutionary biology. In particular, reciprocal altruism, where helpful acts are contingent upon the likelihood of getting help in return, is especially intriguing because it is open to cheaters. In a new study published this week in the open-access journal PLoS Biology, Claudia Rutte and Michael Taborsky demonstrate the first evidence for generalized reciprocal cooperation in non-humans. The authors show that rats who received help in the past were more likely to help another unknown partner.
Mother-of-pearl: Classic Beauty And Remarkable Strength:
While the shiny material of pearls and abalone shells has long been prized for its iridescence and aesthetic value in jewelry and decorations, scientists admire mother-of-pearl for other physical properties as well.
