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Geek_Nan

TIL: In the 1950s the British Navy invented Water Hockey - played in 2-4 meters of water, with fins, snorkels, and a plastic-coated lead puck. It is currently played in over 20 countries that hold a world championship every other year.

cmas.org

Submitted by Geek_Nan t3_11lcq2p on March 7, 2023 at 9:56 PM in todayilearned

11 comments

176

TIL: Black Herons turn their wings into an umbrella to “canopy feed”. The umbrella provides shade, which draws fish to the surface where they can be seen and caught more easily.

audubon.org

Submitted by Geek_Nan t3_11s72zg on March 15, 2023 at 7:46 PM in todayilearned

27 comments

616

TIL: The concept of steganography which is the hiding of messages in plain sight. For example, Phyllis Latour Doyle (British spy) parachuted into France to spy on Nazis before D-day. She used knitting to record messages.

history.howstuffworks.com

Submitted by Geek_Nan t3_11d1afo on February 27, 2023 at 3:18 AM in todayilearned

55 comments

1,851

TIL: If you cut 2 different sponges up, disaggregate them (push them through a sieve), and mix the 2 cell-slurries together - the sponge cells reassociate with their own cells, but not cells of the other species. This is being studied to understand tissue repair and transplant rejection.

tandfonline.com

Submitted by Geek_Nan t3_116vvau on February 20, 2023 at 2:54 AM in todayilearned

37 comments

2,909

TIL: Asthmador was an asthma treatment in the US in the 1950s. It was made up of 3 toxic/hallucinogenic compounds belladonna (atropine), stramonium (nightshade/jimson weed), and potassium perchlorate (oxidant commonly used in fireworks). One common delivery method for Asthmador - cigarettes!

catobear.com

Submitted by Geek_Nan t3_yhlfzz on October 30, 2022 at 6:07 PM in todayilearned

94 comments

995

Geek_Nan

Registered on January 7, 2021

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Running Postmill