They once covered more than 1 million acres ... Today, the biggest trees stand 10 feet tall, with thorns high enough to snag clothing. Dale named some of the 40 or so species now thriving in ...

This was the first giraffe born at the Denver Zoo since the 2017 birth of Dobby, who is now the oldest giraffe in the herd.

The winners? Trees like Texas ebony and mesquite that have thorns to protect them from munching animals and long roots to tap moisture deep within the earth. Guayacan and snake eye, two species ...