What happens to a cat who goes through a wormhole? Tom Gauld returns with Physics for Cats, his second collection of science-based cartoons for the New Scientist. Find out why every scientist worth their sodium chloride has a Tom Gauld cartoon taped to their electron microscope. This new batch of hilarious gags will be as important to every self-respecting scientist as a lab coat and goggles and oversize rubber gloves. Find out what the hadron's news alert about CERN says! Everyone asks, "What is dark matter?" and "Where is dark matter?" but do they ever take the time to ask, "How is dark matter?" Based all on previous data, we can predict with a 99.99% certainty that you will either laugh, guffaw, chortle or snort (we don't have a large enough sample set to be able to say which particular type of mirth you will experience.)