The flapping of a swan's wing can break your arm.

Jean Genet had no eyebrows.

The word "nifty" means "sexually aroused" in several Dravidian languages.

The ostrich is the only bird that can climb trees.

Whatever weather America gets we get a week later. (Darren) Same as "halogen", then? Good stuff, halogen. :-)

Tidal surges are caused by particularly large ships being launched nearby.

The three-toed sloth actually has four toes, one on each foot, but as they fall off regularly and are regrown, the typical sloth only has three toes at any one time.

In the Southern Hemisphere, compasses point towards the south.

The Coriolis Force is the reason why more left-handed people, per head of population, are found in the southern hemisphere than in the northern. (Darren: Sorry, your entry is now null and void - points will be deducted. Depending on how you read it, your statement is correct).

In certain states of America it is illegal to address an accountant as "buster".

It is impossible to cut a circular cake into more than sixteen equal-sized pieces.

There are always seven Wonders of the World. If one is destroyed, an unranked Wonder ascends to the Seven. However, knowledge of which are the Seven Wonders was lost in the 16th century.

There will never be thirteen British monarchs with the same name, since it would unleash a constitutional crisis as to whether the last should be designated XIII or XIIb.