The de-extinction company Colossal Biosciences wants to bring back the woolly mammoth—starting with a very furry mouse.

You only have to brush these dogs about once a week – or more if you want to reduce the amount of fur to pick up around your house. Beyond that, these Chihuahuas are pretty average. Long-haired ...

For example, hairless Chihuahuas are susceptible to sunburn because they do not have any fur. As such, the parents of such dogs need to apply pet-safe sunscreen to their skin. Hairless Chihuahua ...