Why do some birds stand on one leg?Alexander Middleton, Moorooka, Queensland, Australia(Image: bugdog, stock.xchng)Thanks to all those who offered the answer: "If they picked up the other leg they'd fall over." The old jokes are still the best - Ed
The Last Word has told us what percentage of the UK's surface area is roads (24 January 2004), but having just returned from the Netherlands I would like to know what percentage of the surface area of that country is water.Byron Hambleton, Lille, France(Image: NASA World Wind)
The first time I had two pints of beer in my late teens I was horribly sick. Now I can drink two pints of beer without feeling any ill effects.What is the mechanism by which our bodies become tolerant to alcohol, or indeed other drugs, all of which have a smaller and smaller effect with regular use?After all, I am consuming exactly the same amount of poison which made me ill 30 years ago - why doesn't my body just do what it did back then?Rob Howe, Gomersal, West Yorkshire, UK(Image: KAPSA, stock.xchng)
This is a question that my husband, Jon Richfield, cannot answer to my satisfaction. I find the taste of certain common spices quite horrible. The nasty flavour I get from all of them seems, to me, quite similar.The spices that taste this way are aniseed, caraway, cumin, fennel and coriander. Tarragon, cardamom and capers also taste awful in the same way.I wonder if there is a food scientist who knows what they have in common, or what my aversion might be. I should add that I am not a fussy eater in general.Bess Richfield, Somerset West, South Africa
My son has a game in which you hang small plastic monkeys and gorillas from a plastic network of tree branches. The branch network is attached to an overhanging trunk by a magnet. As more monkeys are hooked on, the network becomes more unsteady until the magnet can hold it up no more. The player who breaks the bond is declared the loser.The game depends on a magnet of a clearly defined strength. But how is this strength determined so accurately during manufacture that it can hold almost all the monkeys (but not quite)?Pavel Sypchenko, Kiev, Ukraine
What would happen if a man took the contraceptive pill, either once, accidentally, or daily? Are there any published cases?Arnout Jaspers, Leiden, The Netherlands(Image: thesaint, stock.xchng)
I found this forgotten bar of soap after winter at my home in northern Sardinia. It had grown a coat of mould (pictured). What is the mould and how did it grow on soap, which is supposed to keep your hands clean?Patrizia Figoli Turcheteti, Bellaire, Texas, UK
When I look at an electric light bulb through the fabric of my maroon, acrylic school jumper, why does it seem to have a rainbow halo around it?Thomas O'Hare (aged 6), London, UK