Leaderboard

Pit vipers do not "see" infrared with their eyes. They have openings between their eyes and nostrils --- "pits". The openings lead to a heat sensitive organ. The heat sensitive organ will react to small differences in temperature. I don't need to check out boas and pythons. I am around garter snakes and rarely rattlesnakes. An animal that could see IR would be blinded in daytime.

Apparently DNA was found. https://www.newscientist.com/article/mg22229630-500-denisovans-the-lost-humans-who-shared-our-world

You might be interested in this thread:

What are the olfactory capabilities of the other apes? My understanding is that they are not that much better than our own. Yes people that have to hunt and gather for a living pick up on scents better than most of us but no matter how long one lives in nature you'll never have the capabilities of a wolf, bear etc. Do gorilla, chimp, orangutan or gibbon researcher worry that much about scent when they go in the field? Is there any real evidence that bigfoot has much better olfactory sense than other apes or is this speculation? Just wondering.