Continuous positive airway pressure (CPAP) machines are used to maintain an open airway in patients diagnosed with obstructive sleep apnea. The machine functions by blowing pressurized air into the airway via mask at a setting determined by sleep study and prescribed by a physician.
Only around 180 impact craters have ever been discovered on Earth and around 30 per cent of them contain important natural resources of minerals or oil and gas. The largest and oldest known crater prior to this study, the 300 kilometre wide Vredefort crater in South Africa, is 2 billion years in age and heavily eroded.
About The Chicxulub Crater. The Chicxulub crater on the Yucatan peninsula is believed to be the most likely site of the asteroid impact responsible for the demise of the dinosaurs.The crater measures between 180 and 240 kilometres across, indicating an impactor of colossal size, the biggest impact confirmed on Earth.he Chicxulub crater represents the most recent major impact on the Earth, and despite its geologically young age, it is already an extremely well-hidden structure that has taken teams of geologists and geophysicists many years to unravel.