American trees are in trouble. Based on recent estimates, up to one in every six native species in the continental US is in danger of going extinct, due to mounting threats such as invasive species, ...

Visits to the world’s tallest tree in Redwood National Park in California are now off-limits after hikers damaged the forest and left a mess, rangers reported. There’s no trail to Hyperion, dubbed the ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American When you hear the word “kangaroo,” you ...