Bird tool use evolved for better grub, literally

Some birds, such as New Caledonian crows, use sticks as tools, and now researchers think they know why: better grub. The discovery helps to explain how and why tool use first evolved, but the answer isn't quite as obvious as you might think. Bird - New Caledonian Crow - Tool use by animals - Recreation - Grub

Read the whole article on MSNBC: Science

More from MSNBC: Science