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Remembering dreams, Bermuda triangle, immortal jellyfish

Remembering dreams, Bermuda triangle, immortal jellyfish

Thursday 16th August 2018 9:08 am

Do cucumbers feel pain? Do mozzies have a purpose in the world? How do you measure a black hole?

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@beakerstreetsci

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@beakerstreetsci
www.beakerstreet.com.au

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Water will change its density a little bit with temperature, but ethanol does it 3.7 times better – and the modern liquids in a Galileo Thermometer are better again. This liquid is inside a sealed container – to avoid the effects of the changing air pressure.
Inside the container are a bunch of hollow, weighted glass balls – each carefully calibrated to have a different density, and each with a brass tag indicating the temperature. The single ball that is floating freely indicates the temperature of the liquid.
So what is your favourite super-geek item/collection, and why? And is it useful or beautiful, or both, like the Galileo Thermometer?