The sperm can be used to reseed the reef in the future.
To track the effects of warming seas on coral reefs, a new survey project is launching an extensive database of panoramic underwater imagery.
A mysteriously healthy patch of coral reefs in the Red Sea and Persian Gulf might provide scientists with ways to protect the rest of the reefs
The quest to understand, explore, and protect the amazing animals
The Australian government is trying to keep the Great Barrier Reef off the United Nations' "endangered" listing, but scientists say their plan isn't good enough.
Studying our natural internal bacteria could help doctors cure diseases that affect millions
Plus, a Lexus sedan made of cardboard
But it's not going to be easy for many species
Survey finds new marine species
Manipulating the acidity where a reef lives gives us a window into the effects of climate change.
Our favorite science images of the week
Presenting the winners of the 2016 Vizzies
The science shows that fish use tools, feel pain, have long memories, and deserve better treatment from us.
GeoEye celebrates 12 years of snapping images from outer space in one stunning 2013 calendar.
Pretend you're Charles Darwin and check out the blue-footed boobies, giant tortoises, sea lions and more.
These 10 people have signed up to die on Mars, in order to live there.
Cell biologists get observational omniscience
Scuba-trained investigators are learning protocols for examining watery graves. Rule #1 is not so high-tech: Watch out for 'gators.
Players love the tech, but pro and amateur organizations can hardly keep up with the new materials and radical designs that have rewired and sometimes hot-wired sports.
Real-time immune attack could pinpoint new interventions, thanks to a new procedure
The 20 ideas, trends, and breakthroughs that will shape our world in 2014