2,477 results
- Animals
These lizards bleed green
Blood and bones turn naturally green in island lizards. Their evolutionary history still needs explaining.
- Animals
Feral dogs take a bite out of Andean wildlife
A survey of a remote park in Ecuador finds feral dogs are a problem for many species of native mammals.
- Animals
Tiger protection in Thailand produces results
Despite good efforts, the goal of doubling the global tiger population by 2022 looks impossible.
- Astronomy
Readers unimpressed by Earth’s newest neighbor
Exoplanet fatigue, runaway fish and more in reader feedback.
- Genetics
Gene gives mice and chipmunks their pinstripes
A recycled regulator paints on rodents’ light stripes.
- Health & Medicine
Live antibiotics use bacteria to kill bacteria
Certain bacteria will destroy other bacteria without harming humans. They may be an answer to antibiotic-resistant infections.
- Animals
Early research asked whether cats dream
Early research asked whether cats dream; researchers still don’t know definitively.
- Life
Science explains what makes dogs such sloppy drinkers
There’s hidden precision in the splashy mess of a dog drinking.
- Genetics
Dolly the Sheep’s cloned sisters aging gracefully
Cloning doesn’t cause premature aging in sheep.
- Animals
Dragons sleep like mammals and birds
Some lizards may sleep in the same way as mammals and birds, a new brain wave study finds.
- Science & Society
Special Report: Aging’s Future
What is aging? How does it change the brain? How did different life histories evolve? This special report addresses those questions and more.
- Paleontology
Saber-toothed salmon teeth more like tusks than fangs
Saber-toothed salmon teeth may not have been positioned like fangs at all.
