Snake venoms are complex mixtures of proteins, peptides, and other molecules that have evolved for various purposes, such as prey immobilization and digestion. This video demonstrates how procoagulants in some snake venom promote blood clotting. How does this work? See Next⬇️1/3
These procoagulants directly interact with proteins involved in the blood clotting process. Often these are proteases (cleave proteins) which ultimately lead to the rapid formation of fibrin, the protein mesh that stabilizes blood clots. ⬇️2/3
This Physicist Friday goes to Lise Meitner. Meitner (1878-1968) was an Austrian-Swedish physicist known for her role in the discovery of nuclear fission. Working with chemist Otto Hahn, they bombarded uranium atoms with neutrons, splitting the nucleus and detecting barium. ⬇️1/4
Meitner, along with her nephew Otto Frisch, interpreted the results using Einstein's E=mc^2 to explain the observed energy release. They realized that the splitting of the atomic nucleus into smaller nuclei released a significant amount of energy.⬇️2/4
This insight was crucial in understanding the potential applications of nuclear fission, such as nuclear power generation and atomic weapons.⬇️3/4
Retrograde motion is the apparent backwards motion that planets make as they travel across the sky.
Prior to the sun-centered model of the solar system, it was believed planets made loopty loops as they circled the earth.
The Copernican model explains this motion w/o loops. (1/2)