Imagine a sloth. You probably picture a medium-size, tree-dwelling creature hanging from a branch. Today’s sloths – commonly featured on children’s backpacks, stationery and lunch boxes – are ...

Sometimes it nice to just kick back and take it slow. Really slow. So what if evolution had the same mindset, and decided to take its time before getting rid of some prehistoric creatures? What if the ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Imagine a sloth. You probably picture a medium-size, tree-dwelling creature hanging ...