"We know little about sharks in general...and these are the sharks that live a long way down in the ocean." An Australian shark expert says that there are 600 species of deep sea sharks, and they're in trouble.

August 1, 2008. Today is an eclipse day - a total solar eclipse - where the moon's dark shadow sweeps across Earth. EarthSky asked NASA senior astronomer Sten Odenwald of the Goddard Space Flight Center for more.

At EarthSky.org, we aim to be a clear voice for science, but science doesn't always proceed in a clear, stepwise fashion with unambiguous results and instant agreement on all sides.

EarthSky Communications announced today that its Spanish-language science podcast series - Cielo y Tierra - has exceeded all expectations for its first year.

The Hinode mission is going to tell us much about how the atmosphere of the sun is produced and how it evolves, says solar physicist George Doschek. Hear more about Hinode, a space observatory pointed at our sun.

“Even if we’ve made really serious progress in the fight against AIDS, the glass is half full. We still have a long way to go,” said UNAID's Peter Piot. Piot's been on the front lines of the fight against AIDS in Africa for three decades.

The snapping of Earth's electrical field causes a release of electromagnetic particles that cause the dancing northern lights.

A new method for toxicity testing - employing robots - could one day make the need for lab animals obsolete. Read more about how robots replace animals.

Even before birth - and throughout life - all animals yawn. But scientists are still unclear about why. Robert Provine, a neuroscientist at the University of Maryland in Baltimore, has studied yawning for over 30 years. Read 'Why do we yawn?'

Much of Earth's population today depends on rice for food. In the fight against world hunger, David Salt of Purdue University in Indiana is looking for the genes that regulate micronutrients and trying to create a nutrient-packed rice plant. Read more on how we can make rice healthier.