1. It took humanity approximately 4 times longer to switch from copper swords to steel swords than it took to switch from steel swords to nuclear bombs.

2. Gwen Stefani is older than Ted Cruz

3. When NASA pitched the idea of the Voyager missions to Richard Nixon with the idea of touring the outer planets, he was told that the last time it was possible, Thomas Jefferson was in the White House.

The particular planetary alignment that Voyager 2 used on its journey occurs only once every 176 years.

1. If the sun were scaled down to the size of a white blood cell, the Milky Way galaxy would be the size of the continental United States. The vastness of space is mind boggling.