Cat and squirrels
This pet cat rescued two baby squirrels after finding them stranded in the backyard, owner Mary Cummins wrote on YouTube. Video of the unlikely surrogate parent shows the cat gently cleaning the squirrels and cuddling with them.
Dolphin and sperm whales
Researchers discovered a group of sperm whales that seems to have taken in an adult bottlenose dolphin with a spinal malformation. The dolphin has an "S"-shape spinal curvature that may have put the animal at a disadvantage among its own kind. This is the first known instance of sperm whales cozying up to another species, according to the researchers, but the dolphin appeared right at home. Observations of the odd ocean family found that the dolphin would nuzzle the whale calves, rub against the whales in a friendly gesture, and otherwise socialize with the group.
Cat and chicks
These chicks weren't orphaned for long. After their mother died, the chicks were cared for by Nimra, a 1-year-old cat. The cat looked after the seven chicks along with her kittens.
Sign up for the Live Science daily newsletter now
Get the world’s most fascinating discoveries delivered straight to your inbox.