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.
The facts about the Velociraptor discovery are clear. The first fossil remains to be recovered was a skull. It was found in the Gobi Desert in 1922. Other discoveries were made two years later in 1924 by Henry Osborn.