SolarStratos calls the plane “daring and finely engineered.” It can take off at 31 mph (50 kph). Its maximum speed is 87 mph (140 kph). Cruising speed is around 50 mph (80 kph). The pilot has a ...

Photophoresis occurs when gas molecules bounce more forcefully off the warm side of an object than the cool side, creating ...

The achievement is "one of those unforgettable peaks that define great human and technological adventures," the SolarStratos ...

A more apt description of these events is an "unscheduled off-airport landing." And if the reports published by the National ...

The S&P 500 sits a fraction shy of its record close. Inevitably the altitude makes some twitchy, pointing to perhaps 6,500 where the air may be too thin to sustain bullish life forms. But for Lord Fed ...