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.
An estimated 580 million years, an asteroid slammed into the stony hills of what is now part of South Australia, creating the 56-mile wide Acraman crater. Nothing like a simple round shaped crater, many believe that the impact caused a widespread disturbance to life on Earth.