Tim Dowling: We should be suspicious of news about watermelons timed to coincide with the Fourth of July, when watermelons are traditionally consumed in the US. If you'd made an earth-shattering discovery about watermelons, chances are you wouldn't save it.
Britain is one of the world's largest consumers of puffed, flaked and sugared breakfast cereals. How did that happen when many were said to contain less nutrition than the boxes they come in? Felicity Lawrence investigates