The Powerbreather is a snorkel made from elastic material. It is ring-shaped, sits around the head and is adjustable to different head sizes and so comfortably fits any head size. With the Powerbreather, air is inhaled through the upper section behind the head which is equipped with a check valve and is fully exhaled through a check valve located in the mouthpiece.
Northern Lights #3 - The northern lights look like fire, but to touch, would have nothing to do with it. Even if the temperature of the upper atmosphere can reach thousands of degrees Celsius, the heat is based on the average speed of molecules - after all, this is what the temperature is. However, feel the heat is another matter. The air density is so low at 96 kilometers altitude that a thermometer would register temperatures well below freezing where the aurora occurs.
That selfie of a Danish F-16 pilot firing a Sidewinder missile is actually a frame from a cool video. I'd rather have a perfect animated selfie in an infinite GIF loop, though, so I made this one. Here's another shot as seen from the side.
#airplane #atr "Ser comissaria é... ...morar no mundo e passar de vez em quando em casa....estar longe dos problemas da Terra....sonhar mais alto....conhecer novas culturas, lugares e pessoas....acordar no Sul e dormir no Nordeste....voar sempre mais alto! Sair dessa rotina!...ter estado ontem em Santiago, estar hoje em Buenos Aires, amanhã em São Paulo, depois de amanhã em casa e sentir saudade daquelas poltronas lotadas de gente, daquelas turbulências onde tudo pára e os olhares…