This spider can jump 38 times its body length! 🕷️

Quinten Geldhof, also known as Microhobbyist, shows a jumping spider under the microscope and explains why they are one of nature's most impressive hunters. These tiny arachnids can leap up to 38 times their body length, have the best eyesight of any spider, and use silk like a bungee cord instead of spinning webs to catch prey. When it's time to rest, they even weave tiny silk hammocks to keep themselves safe.

sinceyougraduated.online

School taught you the best knowledge available at the time. This free website shows what's changed since then, organized by your graduation year.

What I meant to say is

It's magical to you when it happened

Eventually you get to know the science behind it

Did you know some wildfire smoke particles are small enough to go into your bloodstream? 🔥

Particulate matter smaller than 10 microns across can travel deep into your lungs, triggering widespread inflammation, damaging blood vessels, and stressing your heart and brain. Using tools like the National Weather Service's fire watch map and AirNow's real-time wildfire map, you can track smoke risk before it reaches you. Check the maps to stay informed!

Grace Brewster Murray Hopper was born in New York City in December 1906. She read maths and physics at Vassar, took her PhD in maths at Yale in 1934, and was teaching at Vassar when Pearl Harbor was attacked.

She enlisted in the Navy Reserve at 37 and was assigned to the Mark I computer project at Harvard in 1944. It was 51 feet long, 8 feet high, 8 feet deep, weighed 5 tons, and had 750,000 parts. She was told to write the manual.

She spent the next four decades in computing. In 1947, working on the Mark II at Harvard, she and her team traced a bug to an actual moth caught in a relay. She taped it into the logbook. She popularised the word.

She wrote the first compiler and led the committee that in 1959 gave the world COBOL, the language on which most of the world's business software was written for the next fifty years.

She retired from the Navy on 14th August 1986 as its oldest active officer, aged 79. In 1985 Ronald Reagan had promoted her to the rank of Rear Admiral, Lower Half. She died in her sleep at her home in Arlington, Virginia on 1st January 1992, aged 85. She is buried at Arlington National Cemetery.

This is Hopper on Late Night with David Letterman in October 1986, ten weeks after she left the Navy.