Toggle navigation
TWunroll
TWunroll
faq
Contact US
Robert McNees
mcnees
During a solar eclipse #OTD in 1932, Karl Jansky saw no change in the intensity of the faint radio hiss he'd been monitoring. This meant that the sun wasn’t the
Read more
Physicist Karl Jansky was born #OTD in 1905. While searching for the source of radio hiss that interfered with transatlantic phone calls for Bell Labs, he discovered that astrophysical objects
Read more
Mathematician Irene Stegun was born #OTD in 1919. A major contributor to the Works Progress Administration’s Mathematical Tables Project, she’s probably best known as co-author of the classic “A Handbook
Read more
Bruce McCandless and Robert Stewart, mission specialists on the Space Shuttle Challenger during STS-41-B, used nitrogen-propelled maneuvering units to perform the first untethered spacewalks #OTD in 1984.Images: NASAhttps://www.flickr.com/p
Read more
Nuclear physicist Melba Newell Phillips was born #OTD in 1907. Author of two standard textbooks and numerous articles on physics history, she worked tirelessly to promote the teaching of physics
Read more
Isaac Newton was made aware of Jean Bernoulli's "brachistochrone" problem #OTD in 1697. He solved it later that evening, showing that the curve of fastest descent between two points was
Read more
HAM the chimpanzee became the first hominid in space #OTD in 1961, launched on a sub-orbital flight aboard Mercury-Redstone 2. His name was an acronym for Holloman Aerospace Medical Center
Read more
Irish physicist Kathleen Yardley Lonsdale was born #OTD in 1907. She pioneered the used of X-ray diffraction to study the structure of crystals; one of her earliest results showed that
Read more
Physicist Polykarp Kusch was born #OTD in 1911. His measurements of the magnetic moment of the electron revealed that its value disagrees with naive predictions by a tiny amount —
Read more
The "Powers of 10" video but there's a mittened Bernie at every scale. Bernies of 10. Powers of Bernie. I’m so sorry that I didn’t do it sooner Okay, following
Read more
A little thread on Emmy Noether and giving credit.Felix Klein gave a lecture at the Mathematical Society of Göttingen #OTD in 1918. He included excerpts from letters in which he
Read more
The physicist Yoichiro Nambu (南部 陽一郎) was born #OTD in 1921. He developed a theory of spontaneous symmetry breaking to explain superconductivity, paving the way for electroweak symmetry breaking via
Read more
‹
1
2
3
4
›
By continuing to use the site, you are consenting to the use of cookies as explained in our
Cookie Policy
to improve your experience.
I agree