Animals

Expanding human populations in India have pushed tigers into small, isolated habitats—and resulted in some unusual behaviors.

Sorry, Tiger Dudes: Your Ladies Are Faking It

India’s tigresses may be feigning interest in sex as the result of shrinking habitat and overlapping territories

What Do Goats, Puppies and Horses Have in Common?

Goats communicate with humans using eye contact, according to a new study

A mudskipper clings to a rocky embankment.

Awkward Robots Show How Tails Propelled First Land Walkers to New Heights

A 3D-printed bot designed to move like amphibious fish suggests that the first land animals needed tails to climb slippery slopes

Cap-Bon-Ami at Dawn Forillon National Park Quebec, Canada

Visit Canada's Jaw-Dropping National Parks for Free

In honor of Canada's sesquicentennial anniversary, explore its spectacular parks gratis

Climate Change Could Devastate Penguin Populations by Century's End

Loss of ice and rising sea temperatures could impact 60 percent of the Adelie penguin colonies in Antarctica

What's the Difference Between Invasive and Nonnative Species? Plus, More Questions From Our Readers

You asked, we answered

For the first time in 32 years, the Smithsonian's National Zoo’s celebrated the arrival of a sea lion pup.

Proud Sea Lion Mom Shows Off Her New Pup in These Adorable Pictures From the Zoo

Calli, the 11-year-old sea lion gave birth on June 26; mother and pup are bonding and doing well

Venomous Lionfish Invade the Mediterranean

A recent survey shows that the fish have colonized Cyprus and may continue to spread

The Brazilian rainforest faces threats beyond deforestation.

Unfortunately, Reducing Deforestation Isn’t Enough To Protect Amazon Biodiversity

Logging, wildfires and other human disturbances lead to species die-offs

Sharks and Humans: A Love-Hate Story

A short history of our relationship with the ocean’s most intimidating fish

Jayson Mesman and his truffle hunting dog Samson hard at work at The Truffle Farm.

These Adorable Rescue Dogs Lead Truffle Hunting Tours in Australia's Majura Valley

An Australian farmer trains these abandoned canines to sleuth out a gourmet delicacy

Spix’s Macaw, Star of “Rio,” Spotted in the Wild for the First Time in 15 Years

Captured in a backlit cellphone video, the sighting gives conservationists hope for the survival of Brazil's little blue birds

Blake Lively in "The Shallows."

How Realistic Is the Shark Science in "The Shallows"?

We ask shark expert Chris Lowe whether the science in the upcoming shark thriller has any teeth. Beachgoers: You're welcome.

Mom, is that you?

Every Sperm Whale Alive Today May Have Descended From the Same Female

An 80,000-year-old "Eve" was the mother of all modern sperm whales—literally

That's one big pile of crabs.

Watch a Horde of Giant Crabs Amass Off of the Australian Coast

Hundreds. Of thousands. Of crabs.

A pair of nilgai, Asia's largest species of antelope.

India Gives Go-Ahead for Farmers to Cull "Vermin"

The cull will include a range of animals deemed troublesome to people—including rhesus monkeys and wild boar in some places

String theory—feline edition.

Cats Are Adorable Physicists

Beneath that fluffy exterior lies a shrewd understanding of how the world works

Artist's rendering of the first U.S. dolphin sanctuary

National Aquarium Will Move Dolphins to Seaside Sanctuary by 2020

Under mounting public pressure, the aquarium's eight bottle-nosed dolphins will soon move to a seaside retreat in the tropics

African dogs, it turns out, make some of the best dads in the mammal world.

Rare 'Family Guy' Mammal Dads Give Us All Something to Strive For

Let’s give a Father’s Day shout-out to mammal dads who put family first—and benefit themselves as well

A male Bombay night frog getting his call on.

The Frog Kamasutra Gains a Chapter, Thanks to Camera-Wielding Biologists

One newly described sexual position for frogs could mean one giant leap for frog conservationists

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