Petrified wood is one of the most sought-after materials in the world for both its aesthetic value and its scientific value.

American school teacher Marc Fogel released from prison in Russia 14 Things in Your Parents’ Home That Are Worth Thousands Now Yellowstone to Yosemite: Kevin Costner speculates the reason behind Teddy ...

The scale invariance in branch diameter dictates how much smaller a limb should be as it branches and how much investment a ...