True or False?

With a total length of 21,196 kilometres, the Great Wall of China is the longest man-made structure in the world. The mighty bulwark was constructed over the course of five centuries and was intended to fend off nomadic tribes, most notably the Mongols. It did so with moderate success.

If you like fish, think about this! Farm-raised salmon is usually white, so salmon farmers add carotenoids, a type of plant pigment, to the fish feed to produce the natural pink color that wild salmon exhibit.

Siamese cats are widely regarded as sleek and attractive creatures today, but they once had crossed eyes and kinked tails! Bred in what is today Thailand, the reason these cats had such a strange appearance became the subject of several legends. In one, they said a Siamese cat was given the job of guarding an important golden goblet belonging to a king. This was a loyal cat of course, and she clutched the cup so hard with her tail that it permanently bent, and stared at it so hard that her eyes became permanently cross eyed.