Plugging the water leak boosts efforts to contain the world's worst nuclear disaster since Chernobyl.
The stricken nuclear power plant needs to dump 11,500 tons of radioactive water to continue with repairs.
Overfishing has culled larger fish from the world's oceans, leaving smaller fish to thrive.
Leatherback turtles can survive for decades, but that doesn't mean they have easy lives.
These highly social animals often travel together in family groups, making it easier for fishing nets to wipe out entire generations.
In response to steep population declines due to overfishing, several species of Atlantic shark are now protected and cannot be hunted.
Due to under-reporting, the actual figure could be several fold higher.
An area of low oxygen deep in the Gulf of Mexico could persist for two years, research shows.
A leatherback turtle has made a surprise return to a Malaysian beach after 32 years, renewing hopes for the endangered species.
Contrary to what you might believe, a clear, blue ocean isn't necessarily a good thing.