Zoology

One reader wonders what graffiti was like before spray paint.

What Did Graffiti Look Like Before Spray Paint and More Questions From Our Readers

You've got questions. We've got experts.

In captivity under human care, a polar bear's life expectancy is about 23 years, per AP. Polar bears rarely live past 30 years old in the wild, with most adult bears dying before they reach 25.

North America's Oldest Polar Bear Living in Captivity Dies at 36 Years Old

Snow Lilly, who died at age 36, resided at the Milwaukee County Zoo for almost 16 years after arriving there in 2005

Cardiovascular disease is the leading cause of death for captive apes.

How Do Gorillas Get Heart Disease? And More Questions From Our Readers

You've got questions. We've got experts

Only two of 18 eggs have hatched so far. Congrats to the gator parents, Snowflake and Blizzard!

Rare Albino Alligators Hatch at Florida Zoo

The pair of white and pink hatchlings lack their species' usual dark coloration

From the air samples, the research team was able to identify 17 species of animals that lived within the zoo enclosures or roamed around it, such as deer and hedgehogs. Pictured here is a binturong (Arctictis binturong) and was one of the mammals detected using this method.

Researchers Vacuum DNA From the Air to See What Animals Are Near

The method may help scientists survey animals in various ecosystems to inform conservation efforts

Coral reef health is an important indicator of the ocean’s well-being. Scientists can study corals to learn more about how climate change is affecting the oceans.

DNA Makes Waves in the Fight to Save Coral Reefs

This emerging technique could help scientists understand and anticipate the threats coral reefs face

Panamanian golden frogs—such as F1, seen here—are native to the rainforests and cloud forests of Panama but haven't been seen in the wild since 2009. Each creature's bright coloration warns predators of its deadly skin, which contains enough toxins to kill 1,200 mice.

A Small Band of Panamanian Golden Frogs Is Saving Their Species From Oblivion

Victims of a deadly fungus, the amphibians are now being selectively bred through a program at the Smithsonian's National Zoo

In planning to re-open, Zoo staff have spent several weeks consulting scientific experts and preparing rigorous healthcare guidelines.

The National Zoo Will Reopen to the Public on July 24

Two bison, an Andean bear and a baby wallaby are among the new animals ready to welcome visitors back

Shanthi, who readily participated in hundreds of behavioral and biological research studies, will be remembered for her unrivaled contribution to conservation efforts.

National Zoo Mourns Beloved Member of Its Herd

The 45-year-old Asian elephant Shanthi was one of the most studied in the world

An animal care staff member at Chicago's Shedd Aquarium feeds some Magellanic penguins.

A Behind-the-Scenes Look at Maintaining Tourist Sites During COVID-19

Despite closures, essential workers are the ones holding down the fort at these popular travel destinations

Paratype of Florida's rare blue calamintha bee (male)

Blue Bee Feared to Be Extinct Is Found in Florida

First discovered in 2011, the rare species reappeared recently after nearly a decade of eluding scientists' watch

Stream live or watch repeated broadcast overnight.

LIVE NOW: Watch the Smithsonian's Earth Optimism Digital Summit

The two-day virtual event will bring scientists and many other experts to highlight success stories in conservation

Research suggests humans can occasionally pass the new coronavirus to cats. But felines are very unlikely to be a source of transmission back to humans.

Why the New Coronavirus Affects Some Animals, but Not Others

While the virus seems capable of infecting some pets and wild animals, these cases probably aren’t occurring often

Nadia and her sister Azul as cubs at the Bronx Zoo in 2016. Both tigers showed symptoms of COVID-19, and Nadia tested positive for the virus.

A Tiger in the Bronx Zoo Tested Positive for COVID-19

Nadia, a four-year-old Malayan tiger, is the first known animal to test positive for coronavirus in the United States

A sign reading "No Entrance!" is seen at the burned-out monkey house of the zoo in Krefeld, western Germany, on January 1, 2020.

More Than 30 Animals, Among Them 'Highly Endangered' Species, Killed in Fire at German Zoo

Authorities say the blaze was likely started by floating lanterns illegally released into the sky on New Year's Eve

On December 24, 2019, the Potter Park Zoo in Michigan welcomed a healthy male black rhino calf.

Baby Black Rhino Born at Michigan Zoo on Christmas Eve

The birth of the yet-to-be-named male calf marks a milestone for conservationists trying to save the critically endangered species

The 'blob' now lives in a terrarium where it loves warm temperatures and humidity.

Paris Zoo Unveils Bizarre, Brainless ‘Blob’ Capable of Learning—and Eating Oatmeal

Physarum polycephalum is known as a slime mold, but it is not in fact a fungus. It’s also not a plant. Or an animal.

Birds are considered an indicator species, representing the health of entire ecosystems.

North America Has Lost Nearly 3 Billion Birds Since 1970

The staggering population loss of 29 percent of North American birds could signal an ecological crisis

By day the members of the Megatherium Club, united by youth, ambition, intelligence and a deep and abiding love of the natural world, hunched over jars of marine worms in alcohol or endless trays of fossils…At night they were ready to cut loose.

The Hard-Drinking Early Smithsonian Naturalists of the Megatherium Club

William Stimpson created a fraternity of young scientists and named it for an extinct North American sloth

Najin (left) and Fatu, the last two northern white rhinos, on the day before their eggs were harvested.

Eggs Successfully Collected from the Last Two Northern White Rhinos

Advances in fertility science will hopefully allow researchers to implant embryos of the species into surrogate southern white rhinos

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