FREAKY FACTS... thinking outside the jar

SCIENCE education revolutionary Sean McDougall shares his favourite freaky facts:
1. The world’s longest-running experiment is establishing the viscosity or fluidity of tar (which is actually a liquid). A piece of tar has been suspended for the last 77 years and, so far, it has produced just eight drops.
2. If you take production processes into account, it takes 170 litres of water to produce one pint of beer.
3. If you ask 1000 people to guess how many sweets are in the jar, they will almost certainly all be wrong. But if you then add up all their answers and divide it by 1000, the average will be within 1% of the right answer.
4. The elephant is the only animal on Earth with four knees facing in the same direction.
5. Albert Einstein kept identical suits so that he didn’t have to waste time thinking what to wear.