Each year in September, corals in the Caribbean stage a mass spawning event. Witnessing it, says marine biologist and TED Fellow Kristen Marhaver, is like swimming inside a snow globe. Here, she explains how corals beget corals — and how she and her fellow scientists are trying to help them along.
Explorer Brent McGregor shares stunning photographs of glacier caves discovered within the Sandy Glacier on Oregon’s Mount Hood.
On three tiny islands in central Japan, stunning natural beauty lives side by side with some of the world’s best contemporary art and architecture. See 10 photos by Iwan Baan.