Image: Halliburton. Downhole camera technology puts eyes underground, enhancing a company's understanding of what is going on within the furthest depths of production and helping operators make important decisions that benefit from the all too valuable sense of sight.
Barium was discovered by Sir Humphrey Davy at 1808 in England. Origin of name: from the Greek word barys meaning heavy Baryta (barium oxide, BaO) was distinguished from lime (calcium oxide, CaO) by Scheele in 1774.
The German chemist Martin Heinrich Klaproth is credited with discovering the element uranium in 1789 in a sample of pitchblende. Klaproth named the new element after the planet Uranus, which had been discovered in 1781.