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
Chemicals in microalgae are crucial for these bright green shrimp's sexual development, but ocean acidification could change that
The fossil is about 1.8 million years old, meaning the bird may have arrived on the continent around the same time as <i>Homo erectus</i>
Beyond Dinosaurs: The Secrets of Earth's Past
The only hyena to live in North America, <i>Chasmaporthetes</i>, had the stature of a wolf and the powerful jaws of its modern relatives
The first sexually reproducing organisms may have found that the energy-intensive enterprise bolstered defenses against malignant cells
Beyond Dinosaurs: The Secrets of Earth's Past
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
Changes in plankton populations over the past centuries correlate with rising sea temperatures
Old fossils and new technology are coloring in life’s prehistoric palette
Researchers calculate that the pests evolved long before bats, which were thought to be their first hosts
In both humans and social insects, the capacity to engage in total war seems to hinge on population numbers
The ebb and flow of rainy seasons corresponds with the hatching of millions of mosquitoes—and the spread of diseases they carry
Though <i>Ambopteryx longibrachium</i> was likely a glider, the fossil is helping scientists discover how dinosaurs first took to the skies
A global assessment compiled by hundreds of scientists found that humans are inflicting staggering damage on the world’s biodiversity
Scallop eyes, which function similar to telescopes, are even more complex than scientists previously knew
Researchers found 80 percent of racehorses surveyed suffered from airway inflammation that impacts performance
Crustaceans in the Mariana Trench and other underwater canyons feed on food from the surface laced with carbon-14 from Cold War bomb tests
In the Gobi Desert, where argali roam, a group of Mongolian researchers work to conserve the wild sheep populations
As temperatures rise and foliage blooms in the north, creatures from insects to whales set out for long treks across the planet
Using a strategy called dynamic ocean management, researchers are creating tools to forecast where fish will be—and where endangered species won't be
A species description from more than two centuries ago has fooled scientists until now
Page 30 of 131