No one knows for sure when the first chocolate bar appeared or even who made it, but an important event occurred in 1828. The Van Houten press was invented, which extracted cocoa butter from the bean – the same press that brought the Cadbury Brothers success with Cocoa Essence.

1.1 Historical Overview. The first noble gas to be discovered was helium (Lockyer, 1869). Spectroscopic investigations of the Sun’s chromosphere during a solar eclipse in India in 1868 revealed a previously unobserved line, close in wavelength to the D1 and D2 Fraunhofer lines of sodium.

The basis for vaccination began in 1796 when an English doctor named Edward Jenner observed that milkmaids who had gotten cowpox did not show any symptoms of smallpox after variolation.

December 3, 1795: Rowland Hill, who invented the first adhesive postage stamp in 1840, was born.

German-American game developer Ralph Baer shows the prototype of the first games console which was invented by him during a press conference on the Games Convention Online in Leipzig, Germany in 2009. Baer died on Saturday