NASA

There are more trees on Earth than stars in the Milky Way. A 2015 Nature study estimated about 3 trillion trees, while NASA counts 100 to 400 billion stars—over seven times more trees. The same study found Earth's trees have dropped about 46% since civilization began.

In 1999, NASA lost a $327.6 million Mars probe to a measurement unit mix-up. Lockheed Martin sent data in pound-force seconds; NASA entered it into a newton-second program without converting. The orbiter drifted off course and burned up in Mars's atmosphere.

NASA's AD-1 was an oblique wing aircraft — one wing pointing forward, the other backward. At supersonic speeds, swept wings reduce drag, but sweeping both shifts the center of lift. The oblique wing solved this by rotating both wings on a single pivot.