Unsolved questions of science
- just a small selection
(convincing answers will be presented here - if you know one please mail me)
- Why is the sky illuminated during earthquakes at nighttime?
- Why is the earth's interior hot?
- Where does earth magnetism come from?
- Why do the continents move?
- Why is the ocean ground never older than 200 million years?
- Where does the oxygen in water at the ocean bottom come from?
- Can some people live for long periods without food?
- Why do men have nipples?
- Why do hens continually lay eggs with normal shells, even though they live in an area that has no limestone and get no food containing large amounts of calcium?
- Why can fields yield good crops for centuries, although huge amounts of all minerals are taken away every year and are not replaced (e. g. manganese)?
Such questions and hundreds more also can be found in The Last Word, part of the British New Scientist website, and on many other websites now. And there are fascinating books on the subject:
- Duncan, R./Weston-Smith, M. (eds.): The Encyclopaedia of Ignorance. (2 volumes) Oxford: Pergamon Press 1977.
- P. Erdös: "Some of my favourite unsolved problems." In A. Baker et al. (eds.): A tribute to Paul Erdös. Cambridge University Press 1990, 467?478