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Science / Wildlife

Hesperornithoides miessleri was a feathered dinosaur with many features we now associate with birds.

Discovery of Raptor-Like Dinosaur Adds a New Wrinkle to the Origin of Birds

A small, 150 million-year-old dinosaur unearthed in Wyoming ran on the ground, but it may have been closely related to some of the first fliers

The little shrimp turn green to blend in with the seaweed meadows they call home.

Newborn Shrimp Often Undergo Sex Reversal, but Ocean Acidification Could Disturb That Natural Process

Chemicals in microalgae are crucial for these bright green shrimp’s sexual development, but ocean acidification could change that

An artist's interpretation of what life could have been like if ancient humans and ancient ostriches crossed paths.

Fossil of Ancient Bird Three Times Bigger Than an Ostrich Found in Europe

The fossil is about 1.8 million years old, meaning the bird may have arrived on the continent around the same time as Homo erectus

An artist’s rendering of ancient Arctic hyenas belonging to the genus Chasmaporthetes. A new study reports that two enigmatic fossil teeth found in Yukon Territory in Canada belonged to Chasmaporthetes, making the teeth the first known fossils of hyenas found in the Arctic.

Beyond Dinosaurs: The Secrets of Earth's Past

Prehistoric Hyena’s Teeth Show Bone-Crushing Carnivore Roamed the Arctic

The only hyena to live in North America, Chasmaporthetes, had the stature of a wolf and the powerful jaws of its modern relatives

A digitally-colorized scanning electron micrograph depiction of a Giardia lamblia protozoan caught in a late stage of cell division, producing a heart-shaped form. Most protozoa, or singled-celled eukaryotes, reproduce asexually, but there is evidence to suggest Giardia lamblia can reproduce sexually as well.

The Evolution of Sex Could Have Provided a Defense Against Cancer Cells

The first sexually reproducing organisms may have found that the energy-intensive enterprise bolstered defenses against malignant cells

Artist's reconstruction of Fostoria dhimbangunmal, a newly described iguanodontian dinosaur.

Beyond Dinosaurs: The Secrets of Earth's Past

Dinosaur Bones Shimmering With Opal Reveal a New Species in Australia

A discovery in an Australian opal mine remained unexamined for three decades—it turned out to be the most complete opalized dinosaur skeleton in the world

Planktonic foraminifera assemblage from Caribbean sediments that provide an accurate picture of the species community before human influence. Each shell is less than one millimeter in size.

Plankton Haven’t Been the Same Since the Industrial Revolution

Changes in plankton populations over the past centuries correlate with rising sea temperatures

Reconstructed color patterns of Sinosauropteryx based on the pigmentation of fossil plumage. The dinosaur is portrayed in the predicted open habitat in which it lived around the Jehol lakes, preying on the lizard Dalinghosaurus.

The Colors of Dinosaurs Open a New Window to Study the Past

Old fossils and new technology are coloring in life’s prehistoric palette

Bedbugs, which were previously thought to be about 50 million years old, could be much older, new genetic and fossil evidence suggests.

Bedbugs Scurried the Earth Alongside the Dinosaurs 100 Million Years Ago

Researchers calculate that the pests evolved long before bats, which were thought to be their first hosts

Large ant colonies with tens or hundreds of thousands of members engage in all-out war with other colonies as they compete for resources.

When It Comes to Waging War, Ants and Humans Have a Lot in Common

In both humans and social insects, the capacity to engage in total war seems to hinge on population numbers

Mosquito-borne diseases, such as Zika, malaria and Rift Valley Fever, threaten billions of people around the world.

How Scientists Use Climate Models to Predict Mosquito-Borne Disease Outbreaks

The ebb and flow of rainy seasons corresponds with the hatching of millions of mosquitoes—and the spread of diseases they carry

Life reconstruction of the bizarre membranous-winged Ambopteryx longibrachium.

Newly Discovered Bat-Like Dinosaur Reveals the Intricacies of Prehistoric Flight

Though Ambopteryx longibrachium was likely a glider, the fossil is helping scientists discover how dinosaurs first took to the skies

A starfish floating on the coral reef, Dominican Republic.

One Million Species at Risk of Extinction, Threatening Human Communities Around the World, U.N. Report Warns

A global assessment compiled by hundreds of scientists found that humans are inflicting staggering damage on the world’s biodiversity

Scallops can have up to 200 eyes, although scientists still don't know exactly how they all work together to help the mollusks see.

What Scallops’ Many Eyes Can Teach Us About the Evolution of Vision

Scallop eyes, which function similar to telescopes, are even more complex than scientists previously knew

Even large equines can get a little hoarse.

New Research

Even Mild Cases of Asthma Can Slow Down Elite Racehorses

Researchers found 80 percent of racehorses surveyed suffered from airway inflammation that impacts performance

The first test of a thermonuclear weapon, or a hydrogen bomb, codenamed Ivy Mike and conducted by the United States in 1952 over the island of Elugelab in Enewetak Atoll in the Pacific Ocean.

Particles From Cold War Nuclear Bomb Tests Found in Deepest Parts of the Ocean

Crustaceans in the Mariana Trench and other underwater canyons feed on food from the surface laced with carbon-14 from Cold War bomb tests

Argali are the largest wild sheep in the world, weighing up to 400 pounds.

The Decades-Long Effort to Protect the World’s Largest Sheep

In the Gobi Desert, where argali roam, a group of Mongolian researchers work to conserve the wild sheep populations

Close-up of a wildebeest, also called gnus or wildebai, in the grasslands of the Masai Mara in Kenya, August 2018.

Twelve Epic Migratory Journeys Animals Take Every Spring

As temperatures rise and foliage blooms in the north, creatures from insects to whales set out for long treks across the planet

Scientists and ocean advocates are hoping to find a way to both protect sea turtles and other threatened species and help fishermen make a living.

How Scientists Are Using Real-Time Data to Help Fishermen Avoid Bycatch

Using a strategy called dynamic ocean management, researchers are creating tools to forecast where fish will be—and where endangered species won’t be

This moth specimen was mistakenly identified as a butterfly in 1793, leaving biologists to wonder what happened to the missing "butterfly" for more than 200 years.

One of the ‘Rarest Butterflies Ever’ May Have Been a Moth All Along

A species description from more than two centuries ago has fooled scientists until now

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