The blood inside your veins is dark red. So, many people wonder why veins look green or blue through the skin instead of red. Veins are types of blood vessels. The other blood vessel types are ...

If you’ve ever been pulled over, you know the sinking feeling in your stomach when you see those red-and-blue flashing lights. You ease up on the gas, silently praying that the police car will pass by ...

Deep in the Stone Age, when Neanderthals still lived alongside Homo sapiens, our ancestors might have been agog at a green light in the night sky. Now, that light—C/2022 E3 (ZTF) (more familiarly, the ...

The last time the comet came this close to Earth was during the Stone Age. On Thursday it’ll make its nearest approach to our planet. By Shannon Hall Feb. 2: This article has been updated to include ...

Democrats are sensing political gains from the Green New Deal heading into Election Day, even as Republicans deride the progressive proposal and some Democratic candidates slink away from it. The ...