The trees will be prioritized to those with the greatest need based on a map of valley heat vulnerability. For more information and how to receive a tree, visit this website.

In the middle of the TV is an upside-down pink triangle crossed out by a red "no" symbol. The pink triangle was used as a badge to identify gay men in concentration camps, and many received ...

Russia has hit on an "offensive triangle" of tactics that are forcing Ukraine to lose ground. The key to reviving Russian airpower has been a surprisingly low-tech weapon: glide bombs. Glide bombs ...

The math concept hidden in this tree art — geometric shapes known as fractals — is apparent in branching patterns in nature and may be key to humans’ ability to recognize such artwork as ...