Why are California sea lions getting sick with cancer? Researchers suspect viruses, PCBs in the water and genetics.

Biologists use weapons to harass Oregon sea lions into leaving an area populated by endangered salmon and other fish.

An energetic little kelpie named "Westie" was rescued after it chased a sea lion four kilometers out to sea from a South Australia beach.

Killer whales and other ocean predators are targeting and killing the pups of a threatened northern sea lion species at an increasingly high rate, scientists wa

Singer says she was almost attacked after the animal mistook her phone for a fish.

Nearly 1,100 sickly sea lion pups that should still be with their mothers have stranded in southern California since the beginning of 2013.

The reasons behind why almost 1,300 ill sea lions have beached themselves on California's shores in 2013 remain unclear..

The Smithsonian's new American Trail zoo exhibit features massive state-of-the-art pools that utilize wave machines to mimic natural coastal waters.

Eastern Steller sea lion populations have made a resounding recovery, from 18,000 individuals in the late 1970s to over 70,000 by 2010.

A whale-spotting dog was overwhelmed by a recent swarm of sea lions and humpback whales in California's Monterey Bay.

Defecating sea lions and marine birds wreak economic havoc on the affluent oceanside San Diego community of La Jolla.

Researchers think unusually warm waters might be the reason for stranded and starving pups.

Has Astoria finally found a way to drive away pinnipeds humanely?

The gridlock-relieving rapid transit project across Lake Washington is a world's first.

As the Florida Keys cleans up and dries out after Hurricane Irma, take a moment to recognize this 113-mile-long feat of American ingenuity.

The AAP clarified their child car seat guidelines to make them easier for parents to follow.

The holidays have plenty of hustle and bustle, and it can overwhelm children on the autism spectrum. Sensitive Santas can help bring seasonal joy.

Treating the country's 110 million STDs comes with a price tag of $16.7 billion a year.

Researchers discover several new species of sharks that can walk along shallow reefs on their fins.

Eco-publisher giving away copies of Riki Ott's book on the Exxon Valdez spill, <i>Not One Drop</i>, in exchange for donations to help in the Gulf coast relief e

As the Arctic warms, meltwater lakes on the Greenland ice sheet are draining to sea more frequently — potentially lubricating the slide of the ice sheet into

This summer the North Carolina Senate passed a bill banning researchers from reporting predicted increases in the rate of sea level rise. But the ocean, unbound

Scientists say the consequences of sea-level rise could be 'horrible.'

The world's best beach resorts may disappear despite efforts to protect them against sea level rise

Sharp reductions in short-lived airborne pollutants could significantly slow sea level rise before 2100

A new study shows that 20 percent of UNESCO World Heritage Sites are at risk, bringing to light the cultural implications of climate change.

This winter, the Arctic ice cap expanded to a total of 5.76 million square miles — one of the lowest areas on record since 1979.

If a small chunk of ice currently plugging the edge of an ice sheet in Antarctica were to melt, it could release massive amounts of ice into the ocean.

Antarctica's melting glaciers launched so many icebergs into the ocean 14,600 years ago that sea level rose 6.5 feet in just 100 years.

Arctic sea ice — the ice that freezes and floats on Arctic waters — is thinning at a steadier and faster rate than researchers previously thought.

Longer days are yet another profound consequence of global warming.

These are just a sample of the things we could lose if temperatures rise 5.4 degrees Fahrenheit over the next 200 years.

A report from the Union of Concerned Scientists shows how many coastal cities are vulnerable to chronic flooding — and how many will be underwater.

We know sea levels will rise, and by just looking at the Southeast region, it's easier to see how sea level rise will affect wildlife and culture.

Stone Age villages on the Orkney Islands are older than Stonehenge, but archaeologists fear that they won't be around for much longer.

Egmont Key National Wildlife Refuge is rich with wildlife and history — and it's under siege from the waters that surround it. And it's only to get worse.

Parents may be teaching babies to use food as a comfort, which leads to obesity later in life, studies show. But as a parent, I'm not buying it.

Visit Steve Sauer's Seattle apartment, a 182-square-foot storage unit transformed into a cozy dwelling.

While traveling through Antarctica, journalist Charlie Bird had an up-close encounter with some adorable seals that left him giggling.

Columbia researcher examines how ultrasound could become part of a comprehensive treatment for various degenerative brain diseases.

Video: Observing a split in the butterfly family tree.

Video: How climate change is impacting freshwater and saltwater marshes.

How to pollen-proof your life with these 20 tips for seasonal allergy sufferers.

With the all-electric Nissan Leaf, your home acts as the car's primary 'filling station.' How will this impact potential buyers who live in apartments or don'

A new forecast from Pike Research says California and New York will be the most popular states for PEV sales.

Multi-university project asks how organic farmers can control these pests and protect their crops.

Scientists have improved on a method that uses an acidic solution to remove radioactive material from soil.

The Mapdwell project at MIT combines Google Maps, solar power data and some smart algorithms to calculate the costs and benefits of installing solar panels.

Long before modern countries like China and Dubai began making artificial islands, the Calusa people built a kingdom on seashells.

Outdoor Photographer of the Year honors the best images from 2018 that highlight landscapes, wildlife and nature.