The combination of alcohol plus cabin pressure at cruising altitude may threaten sleeping plane passengers' heart health, ...

LEO ranges in altitude from 100 miles (160 kilometers ... In the short-term, lower atmospheric density at high altitudes isn’t a huge concern. But in the long-term, the effect can significantly ...

Atmospheric pressure decreases exponentially with altitude, causing a drop in blood oxygen saturation level to around 90% (73 hPa) in healthy passengers at cruising altitude, explain the researchers.

Such decreased density will reduce drag on objects orbiting in the upper atmosphere, between 90 and 500 km altitude, extending the lifetime of space debris and elevating the risk of collisions ...