Today is 20th April, 09 and here’s what happened today in tech…

1 – 295 8th recorded perihelion passage of Halley’s Comet.

2 – 1902 Marie and Pierre Curie isolate radioactive element radium.

3 - 1940 1st electron microscope demonstrated (RCA), Philadelphia

4 - 1951 U.S. performs atmospheric nuclear test at Enwetak.

5 – 1972 Apollo 16′s Young and Duke land on Moon with Boeing Lunar Rover #2.

6 - 1973 Canadian ANIK A2 becomes 1st commercial satellite in orbit.

7- 1994 Space shuttle STS-59 (Endeavour 6), lands.

8 – 1997 27th Easter Seal Telethon raises $47,392,682.