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.
Spanbroekmolen crater in November 2009. It was created in 1917 by one of the mines in the Battle of Messines. It is also known as Lone Tree Crater or Pool of Peace and located on one of the highest points of the Messines Ridge.panbroekmolen crater in November 2009. It was created in 1917 by one of the mines in the Battle of Messines. It is also known as Lone Tree Crater or Pool of Peace and located on one of the highest points of the Messines Ridge.