Sometimes, it's good to hold a mirror up to yourself. But that's probably not the best advice for Simba, the feline star of an Instagram video that has recently gone viral. Simba was just born in ...

Inspired by a reader’s claim his cat possibly possesses theory of mind, I decided to test my own pet (Letters, 25 January). The experiment: I stand in front of a (full-length) mirror with Samson, a ...