Biology

Scientists are investigating how blood cells or other parts of blood might be responsible for aging.

Old Mice Could Live Longer by Sharing Young Blood, Study Finds

After surgically attaching pairs of mice, scientists suggest the procedure could rejuvenate the older individuals, slowing their aging

The snake's new enclosure is specially designed to help the creature avoid hurting itself.

A Rare Two-Headed Snake Is Back on Exhibit at a Texas Zoo

Pancho and Lefty, as the western rat snake is known, has now healed from an injury it suffered more than two years ago

An artist's interpretation of what Perucetus colossus would have looked like when it lived some 38 million years ago

This Massive Extinct Whale May Be the Heaviest Animal That Ever Lived

The newly discovered behemoth could unseat the blue whale for the title, but scientists can only make educated guesses about its weight

Fork-tailed drongos have a signature color and pattern on their eggs, which helps them avoid getting duped by African cuckoos.

How These Birds Can Spot Look-Alike 'Imposter' Eggs in Their Nests

Fork-tailed drongos can identify and reject egg forgeries, laid by African cuckoos, with nearly 94 percent accuracy, new research suggests

The so-called puss caterpillars have sharp spines that can inject powerful venom into humans.

Scientists Reveal Why Asp Caterpillar Stings Are So Excruciatingly Painful

A toxin in the insect's venom, which can punch a hole in cell walls, could inspire new drug-delivery methods in humans

Honeybees, which are not native to the United States, may be outcompeting native bees for pollen.

Pollination From Honeybees Could Make Plants Less Fit to Survive and Reproduce

Plants visited by honeybees rather than native bees may become more inbred, a new study suggests

A researcher holding human embryonic stem cell cultures in 2004. In the new research, scientists use human stem cells to make models similar to human embryos. The models cannot develop into fetuses.

Researchers Create Model Human Embryos Using Stem Cells

The teams hope to learn more about the first few weeks of human development and provide insights into treatments for infertility and diseases

Tighter curls may dissipate more heat than other types of hair or no hair.

Curly Hair Keeps the Head Coolest

A new study suggests our locks may have evolved to prevent our brain from overheating

After eight months of hibernation, Arctic ground squirrels emerge in the spring hungry and ready to mate.

Climate Change Is a Wake-Up Call for Hibernating Squirrels

As spring arrives sooner, female Arctic ground squirrels are emerging from their burrows earlier, according to a new study

An image of stem cells on a computer screen from 2010. Stem cells have the potential to develop into various types of cells.

Scientists Create 'Synthetic Embryos' From Monkey Cells

By studying lab-grown stem cells, scientists hope to shed light on miscarriages and birth defects

Brazilian reef octopuses, like other types of cephalopods, defend themselves against predators by inking and extending their mantles. 

Octopuses May Have Vivid Nightmares, Video Suggests

Costello, a male Brazilian reef octopus, had "bizarre" defensive outbursts while sleeping in a lab

Christopher Heckscher, ornithologist by day and firefly hunter by night, at work in the Nanticoke Wildlife Area, Delaware.

The Illuminating Science Behind Fireflies

A dedicated ornithologist with a passion for lightning bugs scours bogs and beaches to discover previously unknown species

Male California sea lions are polygamous and must fight to defend their territories and their harems.

Why Male California Sea Lions Are Getting Bigger

The “raccoons of the sea” have varied diets, allowing them to grow large to compete for mates

One of the many Edicaran biota fossils within the bounds of Nilpena Ediacara National Park, which is now open in South Australia.

The World's Newest National Park Protects 550-Million-Year-Old Fossils

The 148,000-acre Nilpena Ediacara National Park in South Australia is helping scientists unravel the mysteries of life's evolution on Earth

Park-goers hoping to catch a glimpse of the synchronized flashing of fireflies can soon enter a lottery.

How You Can See Tens of Thousands of Fireflies Flash in Unison

The lottery for viewing these bioluminescent bugs at Great Smoky Mountains National Park opens Friday

Ellie, an 11-year-old Goffin’s cockatoo, video chats with a friend.

Scientists Taught Pet Parrots to Video Call Each Other—and the Birds Loved It

Wild parrots tend to fly in flocks, but when kept as single pets, they may become lonely and bored

Sarracenia pitcher plants typically live in bogs in the southeastern United States.

Carnivorous Plants May Lure Insects With Specially Tailored Scents

Pitcher plants appear to use different odor cocktails to attract bees, moths, ants and other bugs into their death traps

One-third of the world’s population can’t see the starry band of light in the night sky that makes up the Milky Way (above). The new show “Lights Out: Recovering Our Night Sky” at the National Museum of Natural History looks at the devastating impacts of artificial light.

Why It’s Time for a Worldwide Lights-Out Program

A new Smithsonian exhibition delves into the issue of light pollution, with easy solutions offering an immediate change

A wild Asian elephant in Sri Lanka

Watch This Elephant Peel a Banana With Her Trunk

Pang Pha likely learned to de-skin the yellow fruits while observing her human caretaker in her youth

Now extinct, thylacines are carnivorous marsupials that once roamed freely around Australia, Tasmania and New Guinea.

Extinct Tasmanian Tigers May Have Survived Longer Than Previously Thought

Though the last documented thylacine died in 1936, a new study based on alleged sightings suggests the species lived for decades more

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