For over 2 million years, dire wolves roamed present-day North America until their extinction around 10,000 B.C. On Monday, a Dallas-based bioscience firm said it had brought the species back to ...

Only males emit this trademark ... of all North American frogs, this giant can grow to a length of 8 inches or more and weigh up to 1.5 pounds. Even the tadpoles of this species can reach 6. ...