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 study has everything: jumping spiders; insects donning striped and solid patterns; and evolutionary lessons about predators and prey. By Jack Tamisiea The researchers started by collecting ...