A new technique that looks at chemical clues in seawater suggests that the meteorite that wiped out the dinosaurs 65 million years ago was a mere 2.5 to 3.7 miles (4 to 6 kilometers) across.
Warming may cause a feedback loop by decreasing plant growth that causes reflective clouds to form, according to scientists studying the age of dinosaurs.
A system of underwater listening posts off the New England coast detects whale sounds and then automatically alerts ships to slow down to avoid killing the critically endangered animals.
Last year's magnitude 8.1 temblor crossed a fault between two tectonic plates that should have stopped it from becoming that powerful, a study of local reefs reveals.
The canyon's Upper Granite Gorge formed 55 million years ago, a new study says, suggesting that the Grand Canyon we see today may be the result of "ancestral" canyons that slowly grew together.
South Korea's first astronaut, a woman named Yi So-yeon, and two cosmonauts took off in a Russian spacecraft for the International Space Station on Tuesday.
New magnetic clues lend weight to a controversial theory that Earth became massively imbalanced in the distant past, sending its tectonic plates on a mad dash to even things out.
Proteins in the reptiles' blood have been shown to kill drug resistant bacteria and even to partially destroy the virus that causes AIDS, researchers announced.
The new European ship delivered food, water, and clothes. The craft has an extremely bright, if short, future—including a fiery, final reentry into Earth's atmosphere.
