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.
Summertime part 2. The Chicxulub crater is an ancient impact crater buried underneath the Yucatan Peninsula in Mexico. Its center is located near the beach village of Chicxulub, after which the crater is named.The crater is more than 110 mi in diameter, making the feature of the largest confirmed impact structure on Earth.The crater was discovered by Glen Penfield, during the late 70âs.ts center is located near the beach village of Chicxulub, after which the crater is named. The crater is more than 110 mi in diameter, making the feature of the largest confirmed impact structure on Earth. The crater was discovered by Glen Penfield, during the late 70âs.