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TIL The first person to discover viruses was the plant biologist Martinus Beijerinck. Before that, scientists thought that they were a type of small bacteria.

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kJWXE TIL that Wilma Flintstone was the first animated character to be depicted as being pregnant
jXdp TIL Helsinki is expanding below the surface. Incised into the city’s bedrock are a swimming pool, a shopping area, a church, and a hockey rink. Just to name a few facilities besides 40 miles of tunnels for heating and “parking caverns”. They plan to built 400 buildings until 2020.
xeRB TIL there are an estimated 7 northern white rhinoceros left in the world.
VJgD TIL that a person using homemade equipment recorded the Apollo astronauts speaking from the moon during the first landings. He had hoped to catch NASA out but was disappointed to find that the live TV coverage matched his own recordings.
l6d5 TIL “"No president has ever used the [Emergency Alert System] system or its technical predecessors in the last 50 years, despite the Soviet missile crisis, a presidential assassination, the Oklahoma City bombing, major earthquakes and three recent high-alert terrorist warnings…”