As Chile's central mountain region warms, guanacos are wandering into trouble.
An animal's poop may seem like something to avoid, but it's full of information about the creature that left it there.
A new analysis of an extinct giant kangaroo skull suggests it was adapted to eat tough, woody material - a feeding style not found in any modern marsupials.
In large ecosystems, managing elephant populations so they don't exceed a certain threshold number is arbitrary.
The focus of CITES is not solely on the protection of species. It also promotes controlled trade that is not detrimental to the sustainability of wild species.