Critical technical systems on which human life may depend usually contain a lot of redundant components to ensure reliability. Sometimes however, non-redundancy might be better... (More)

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Early computers and dinosaurs had something in common - they were physically large and became extinct. Here is a personal account... (More)

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Long before the first human footprints on Mare Tranquilitatis 40 years ago man had travelled to the Moon. Not physically of course - this had to await the space age - but in our mind we are free to follow our phantasy ... (More)

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The Moon doesn't have an atmosphere so you would expect the Sun to just appear there at sunrise without any warning, unlike twilight on Earth. Well here's a surprise... (More)

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36 years ago some astronomers managed to observe a total eclipse of the Sun for a duration of 75 minutes - a record that has not been broken. How was this possible? (More)

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An equation which was first published 400 years ago continues to be in demand - more than ever before. (More)

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It's the week of summer solstice on the northern hemisphere which means that the sun never sets above the Artic Circle and those brave people who stay the winter over in Antarctica are at the midpoint of half a year of total darkness, right? Well it's worth to take a more careful look. Which places get the most sunshine and how dark does it ever get? (More)

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Some people like to get away from home as far as possible. Just how far away can you get and who has been furthest? (More)

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