A slice of cool, fresh watermelon is a juicy way to top off a Fourth of July cookout and one that researchers say has effects similar to Viagra — but don't necessarily expect it to keep the fireworks going all night long. Watermelons contain an ingredient called citrulline that can trigger ...

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. This story, however, is not entirely without merit: according to Dr Bhimu Patil, director of Texas A&M University ...