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.
The biggest attraction is the crater called âEl BoquerÃ³nâ (wide mouth) which is 5 kilometers in diameter and 558 meters deep. What is so interesting that there is a smaller crater called âel boqueroncitoâ (small mouth) created after the last volcanic eruption in 1917. Reaching it is quite a challenge but a great workout! Hiking and nature lovers, this oneâs for you! There are many trails leading to the âgiganteâ, the giant crater.