How are comets classified?

From dark matter to deep-sea crabs, science still can’t fully explain these strange quirks of nature

T hink of Florida and you’ll likely conjure up images of Miami Vice, David Beckham’s football club or theme parks like Walt Disney World and Universal Studios. But drive an hour south along US Route 1

As you read this, your body is playing host to countless battles. If you’re currently fighting off an infection, this might feel obvious. But, even if you’re well, the two trillion cells that make up

When to use this chart 1 December at 00:00 UT 15 December at 23:00 UT 31 December at 22:00 UT On other dates, stars will be in slightly different positions because of Earth’s orbital motion. Stars tha