The African Wild Dog is the most efficient hunter of any ... United States and the northern United States and it went almost ...

So why are they becoming extinct? Wild dogs used to be common across Africa, but now experts believe only between 3,000 to 5,000 are still alive - making them the most endangered mammal in Africa.

Darwin was wrong about dogs. He thought their remarkable diversity must reflect interbreeding with several types of wild dogs. But the DNA findings say differently. All modern dogs are descendants ...

The challenge for the dogs — and their human collaborators — is that there are likely fewer than 200 of the reptiles in the wild, and they often hide in spider burrows or under rocks ...