Happy Birthday, Scientist
🔸️Carl Sagan contributed to the discovery that the atmosphere of Venus is prohibitively hot and dense, and found evidence that Saturn's moon Titan contains oceans stocked with the building blocks of life.
🔸️He was an outspoken proponent of the search for extra-terrestrial life, including sending probes to other planets and listening with large radio telescopes for signals from intelligent aliens. Credit ESA.
9 November - Inventors' Day - celebrated in the German-speaking countries Germany, Austria and Switzerland - on the birthday of the Austrian-born inventor and beautiful Hollywood actress Hedy Lamarr whose main invention was the frequency-hopped spread spectrum 1942.
Hedy Lamarr's invention is the basis for today's WiFi, GPS, and Bluetooth communication systems.
Happy Birthday, Scientist.
Gottlob Fregehe was largely ignored during his lifetime. Giuseppe Peano (1858–1932), Bertrand Russell (1872–1970), and, to some extent, Ludwig Wittgenstein (1889–1951) introduced his work to later generations of philosophers.