In order for a viable, sustainable economy based on human spaceflight to emerge in low Earth orbit (LEO), a number of elements must be present. First, the marketplace dynamics of supply and demand ...

Add Yahoo as a preferred source to see more of our stories on Google. A rare kind of meteorite known as enstatite chondrite resembles Earth's composition roughly 4.5 billion years ago. The key to ...

When Earth first formed, it was too hot to retain ice. This means all the water on our planet must have originated from ...

(CNN) — Researchers say they have uncovered evidence that early Earth was home to more hydrogen than previously thought, calling into question widely held beliefs about the origins of water and the ...

The United States led global production of rare earth elements (REEs) until the mid-1990s, when China emerged as the dominant supplier. China maintained near-total control of the market until 2012.

Scientists widely agree that an ancient planet likely smashed into Earth as it was forming billions of years ago, spewing debris that coalesced into the moon that decorates our night sky today. The ...