Days in winters are short because of Earth’s tilt. Learn why sunlight lasts less time, nights grow longer and the Winter Solstice happens.

If you're a parent of young children, chances are the Elf on the Shelf comes to your home during the holiday season. You give it a name, prop it on a shelf, and instantly you have Santa’s personal ...

Discover why volcanoes erupt, how magma and gases cause eruptions and why volcanoes are essential for life on Earth.