36019 May 1910: Earth passes through the tail of Halley's Comet
In 60 words
On 19 May 1910, the Earth passed through the tail of Halley's Comet. Newspapers had reported that the tail contained poisonous gas, and some people panicked and bought 'comet pills'. Scientists explained the gas was far too thin to harm anyone, and nothing happened. Halley's Comet returns in 2061.