Earth might have caught a new moon, and it's super tiny

Many of the planets in our solar system have multiple moons, and some even have dozens of large objects cruising around in orbit around them. Earth, by contrast, has just one large moon. Thanks to its solo nature, we even just call it "The Moon," which is convenient, but that doesn't mean that other natural objects couldn't also get snagged by our planet's gravity, and researchers think they might have just spotted a "mini moon" orbiting our planet. The pint-sized object known as 2020 CD3 was ac...