CIRCLE WITH A DOT

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May 20 is World Bee Day.
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@minouette I once read about this day on another platform, but honestly I still doubted it really existed. Now that I have seen it here again, I believe there is truly an #Internationalday for #Bees . Thanks for respecting and appreciating #nature in such a beautiful way.
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Happy birthday to #philosopher Bertrand Russell (1872-1970) who, amongst other things speculated about a teapot orbiting in space.
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@minouette The #BertrandRussell Archives are just one of many reasons to visit #McMasterU in the Hammer. https://library.mcmaster.ca/spaces/archives/russell
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Happy birthday to Danish #seismologist Inge Lehmann (1888 – 1993) who demonstrated that the Earth’s core is not a single molten sphere, but contained an inner solid core, in ‘36.
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She later also discovered the Lehmann discontinuity in the mantle. When she received the Bowie medal in ‘71 (1st woman to receive the highest honour of the AGU), her citation noted that the “Lehmann discontinuity was discovered through exacting scrutiny of seismic records by a master of a black art for which no amount of computerization is likely to be a complete substitute...”.⁠ 🧵5/5