Doug Brown and his brother Roger, right, operate Slopeside Syrup in Richmond, Vt. They're challenging a proposed federal label that would say maple syrup has "added sugar."
John Dillon/Vermont Public Radio
Yao honey hunter Orlando Yassene holds a male greater honeyguide temporarily captured for research in the Niassa National Reserve, Mozambique. The birds will flutter in front of people, tweet and fly from tree to tree to guide hunters to bees' nests that are hidden inside the trunks of hollow trees. This teamwork could date back thousands or even a million years.