Traditional Japanese swordmaking begins with iron-rich sand rather than mined ore. Through a demanding process involving clay furnaces, charcoal, and repeated folding, swordsmiths transform raw ...

Snow isn't always white; algae can make it look green, red, or orange, and scientists are trying to understand how and why these colorful patches appear.

We were overwhelmed by the response to our annual Letters to Santa feature, with more than 1,250 letters submitted this year. Due ...