Scuba diver on shipwreck

Do Artificial Reefs Work?

Some authorities are trying to create fish habitats by cleaning old structures and dumping them at sea. But do these artificial reefs really work?
Red snapper chromolithograph 1898

Fish Are Smarter Than You Think

Fish intelligence? Yes, many studies have documented the ability of fish to learn from their environment. Fish exposed to a more complicated environment have an edge in learning.
Crown-of-thorns starfish crown of thorns

When Crown-of-Thorns Starfish Attack

Australia's iconic Great Barrier Reef is facing a threat from a massive outbreak of crown-of-thorns starfish.
Japanese tsunami debris

Marine Debris and Its Dangerous Hitchhikers

Larger pieces of floating debris, like that caused by the Japanese tsunami, may carry hitchhikers in the form of organisms native to their place of origin.
Mating Mallard Ducks

Unveiling Nature’s Mysteries: Mutant Sea Stars, Junk Jellyfish, and Duck Sex

Confront nature's mysteries, scientists find mutant sea stars surviving in warming waters and that sexual competition forces ducks to grow longer penises.
dead fish float in a polluted river

A Dead Fish “Vitamin Pill,” Microbes that Put Dinner on the Table, and a Truck that Runs On Cow Manure

From microbial biochemistry to recycling dead fish to manure-to-energy converters, here’s this week’s most surprising sustainability news.
Orca whale

How Killer Whales Kill

Orcas may look cute, but don’t be fooled. They display some of the most sophisticated hunting techniques of any animals on Earth.