85 search results for "theory"

Unusal Moon Magnetism may be due to gravity from Earth

A new model for generating a global magnetic field in the ancient moon could help solve a 40-year-old mystery. The Earth has a magnetic field because it has a spinning solid core surrounded by hot metallic liquid, which churns around lava-lamp style and generates magnetism. But the moon is too small and cool to possess such a molten interior and therefore lacks a global magnetic field.

Hummingbirds can keep dry with motion

It’s a question with the deceptive simplicity of a zen koan: How does a hummingbird keep dry? It’s not by staying out of the rain. Instead, as shown in a series of high-speed videos that reveal what’s hidden to the naked eye by time, hummingbirds shake themselves like dogs.

Russia Returning to Mars After 15-Year Break

If you don’t succeed the first 18 times, try, try again. That might be the motto of the Russian space agency Roscosmos, which is preparing to launch its first new probe to Mars after a long string of failures and a 15-year hiatus on planetary science exploration.

Scientists Question Faster-Than-Light Neutrinos

Last night, in response to a worldwide surge in interest, the OPERA experiment released a paper that describes the experiments that appear to show neutrinos traveling faster than the speed of light. And today, CERN broadcast a live seminar in which one of the work’s authors described the content of the paper. Both of those emphasized the point of our initial coverage: figuring out whether anything is traveling beyond the speed of light requires incredibly accurate measurements of time and distance, and the OPERA team has made an extensive effort to make its work as accurate as possible.

Can Neutrinos Move Faster Than Light?

If it’s true, it will mark the biggest discovery in physics in the past half-century: Elusive, nearly massive subatomic particles called neutrinos appear to travel just faster than light, a team of physicists in Europe reports. If so, the observation would wreck Einstein’s theory of special relativity, which demands that nothing can travel faster than light.