› added 6 days ago

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TIL That against the almost universal cliche, xxxx doesn't grow on Trees, Oxygen does actually 'grow' on trees, although the bulk on Earth's oxygen is produced in other ways.

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wLg4M TIL about substitute teachers’ week. Every year in Alberta, Canada the Alberta Teachers’ Association dedicates a week to recognizing the work of substitute teachers.
Mlv0 Today I learned that in 1983, Russian Lieutenant Colonel Stanislav Petrov heroically prevented a full retaliatory nuclear attack against the United States and NATO allies when his Oko nuclear early warning system detected 6 missiles coming from the U.S. and he immediately declared it a false alarm.
R5r88 Til- its illegal to shoot game birds and wildfowl on sundays and Christmas in the UK
b9yj9 TIL that sponges can reproduce sexually. They can also reproduce asexually but I still find this weird.
R7NP4 TIL There are a billion missing years in earth's rock layers -- one theory is that Snowball Earth, where miles of ice eroded those rock layers and sent the sediment into the oceans where they were plunged back into the mantle to be recycled -- there are also no fossil layers before this period