Category: Science

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.

Giant Radio Telescope Sees Inside Galactic Smash-Up

A radio telescope array being built in the highest, driest desert in the world has photographed two colliding galaxies for its first public-test shots. The new images reveal a flurry of star formation within thick clouds of gas and dust at the Antennae Galaxies’ impact zone, 45 million light-years away.