Thanks to 23andMe for sponsoring this video! http://www.23andme.com/minuteearth Snakes occupy a special place in the human brain because they're so weird. Thanks also to our supporters...
========== Hi, this is Kate from MinuteEarth. Our early ancestors were tasty snacks for
everything from carnivorous mammals to birds of prey; luckily, they had developed a basic
predator pattern recognition system that quickly located general threats and gave the primates
time to escape. But when predatory snakes first came on the
scene, that system totally failed. That’s because snakes are essentially stick-look-alikes
whose hundreds of rib muscles and huge ventral scales help them move in a way that no other
predator does, which kept them incognito and helped them chow down on unsuspecting prey. But eventually, some of these primates evolved
what amounted to snake detectors - adaptations like neurons devoted specifically to snake-spotting
- that helped the protomonkeys ...