Toxic air pollutants are poisonous substances in the air that come from natural sources (for example, radon gas coming up from the ground) or from manmade sources (for example, chemical compounds given off by factory smokestacks) and can harm the environment or your health.
Subsequently, Scorpius X-1 was discovered in 1962 by a team, under Riccardo Giacconi, who launched an Aerobee 150 sounding rocket carrying a highly sensitive soft X-ray detector designed by Frank Paolini.
Discovered in 1902, Tyrannosaurus Rex was one of the largest predatory dinosaurs. Its name, meaning Tyrant Lizard King, was created by Henry Fairfield Osborne in 1905. On August 12th, 1990, the largest and most complete T-Rex skeleton was discovered on a farming ranch in South Dakota, USA.