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.
A massive asteroid hit the earth at Chicxulub on the Yucatan Peninsula in Mexico about 65 million years. The meteor crater is 180 km from rim to rim and scientists have worked out that the asteroid must have been 10 km across.