KNOWLEDGE CAPSULE The safety match was invented by Gustaf Erik Pasch (in the year 1844). It was later improved by Johan Edvard Lundström. *.Cartography is the science of making maps. *.Cobalt-60 is an artificial radioactive isotope of cobalt used for sterilizing surgical instruments. *.Photoelectric effect was discovered by Heinrich Hertz and Wilhelm Hallwachs in the year 1887. *.Sheep can recognize individual human and sheep faces, and remember them for years. *.Silumin is an alloy of aluminium and silicon used for casting purposes. *.Molten lava is up to 100,000 times as viscous as water. *.An acre of rich fertile farmland may contain up to 1,750,000 earthworms. *.The first colour photograph was created by the Scottishphysicist James Clerk Maxwell, with the helpof the English photographer Thomas Sutton, in the year 1861. *.Capybara is the largestliving rodent in the world.
Posted on: Tue, 16 Jul 2013 17:17:41 +0000
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