If you’ve ever seen both a ferret and a weasel, you’ll agree that it can be pretty difficult to spot the difference between ...

Their heart rate drops and they go into a deep sleep, a bit like animals in hibernation do. This is one reason why so many orphaned weasel kits are found still alive. Twiz before her eyes had opened.

When monitoring the health of mammal populations, scientists often use camera traps to observe the animals in their habitats. But weasels are so sneaky they're rarely caught on camera -- leaving ...