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.
Also the second largest impact structure on Earth, the 1.85 billion years old Sudbury crater in Canada, hosts world-class mineral deposits - in this case nickel-rich minerals that were melted and concentrated by the extreme heating caused by the impact.
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.