In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
When a massive power outage struck southern California in the 1990s, Los Angeles residents reportedly called 911 to express alarm about strange clouds hovering overhead; they were seeing the Milky Way for the first time.
31
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
If two pieces of metal touch in space, they become permanently stuck together.
808