This jumping spider appears to be staring at you with four giant eyes, but it actually has eight eyes around the top of its cephalothorax (head and upper body). While the largest pair of eyes provides ...

Jumping spiders seem to use a part of the eye that contains out-of-focus images to assess distances. Could it help us build a better robot?

For Emily Hess, it was a Phidippus regius named Gretel. Hayden Shea's first was caught by her boyfriend's dad. Sunday Costell ordered her first one off eBay. "I went from selling three to four a week ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American The field season is starting! This means that ...