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National Geographic grantee Erin Spencer dives into this week’s Today I Learned with one of the leading threats to biodiversity: the invasive lionfish.

Read more video.nationalgeographic.com

l7KJ7 TIL that Qatar has sequenced the genes of around 10% of its citizens, as part of a genetic screening program as 26.7% of Qatari marriages are with first cousins.
wgm1 TIL a man kayaked from Germany to Australia between 1932-1939 only to arrive and be detained as a POW due to the outbreak of WW2
awo5M TIL Professional mourning or paid mourning is an occupation that originates from Egyptian, Chinese, Mediterranean and Near Eastern cultures. It is still a paid profession as of today.
78BXO TIL that a local guide in Odessa, Ukraine has started breeding fish in the compact underground pool of the city’s catacombs.
neM8P TIL that the mathematics behind Wifi was discovered by scientists trying to find mini black holes.