It's a bird; it's a plane!! It's a ... cloud?! No, it's a massive, once-military-grade hover-capable blimp designed to ...

Over 50,000 submissions are made for images on U.S. stamps every year, and out of those, about 40 are turned into real stamps ...

Scientists have identified a promising new way to detect life on faraway planets, hinging on worlds that look nothing like ...

Hydrogen is a much-debated option in terms of CO₂-neutral energy production. Electrolyzer units that split water into its ...

The line became known as the main sequence. Competing groups of astronomers came up with different ways to categorize main ...