This top-secret plane has been in space for a year, and we don't know why
It has now been a year since the U.S. Airforce launched the mysterious X-37B into space, leaving many to wonder why it’s there.
It has now been a year since the U.S. Airforce launched the mysterious X-37B into space, leaving many to wonder why it’s there.
Solar Impulse 2 is one step closer to reaching its goal of becoming the first airplane to circumnavigate the world without using a single drop of fuel.