Cache not at these cord's!!!

1. George Thomas Morton performed the first U.S. operation to remove an appendix, an appendectomy, saving the life of a 26-year-old man with appendicitis.
   
2. 4 men and 4 women entered Biosphere 2
   
3. The planet Pluto is discovered by Clyde Tombaugh, the only planet to be found by an American astronomer
   
4. Louise Joy Brown, the first test tube baby was born in Oldham
   
5. First self-propelling steam engine or steam locomotive was tested at the Pen-y-Darren ironworks on its normally horse-drawn tramline
   
6. First major Middle East oil strike was made at Masjid-i-Suleiman, Persia.
   
7. Bryan Allen won the Kremer Prize for the first human-powered flight as he pedalled the Gossamer Condor for at least a mile at Schafter, California.
   
8. A forest fire at Concord, N.H. was drenched with rain produced by seeding cumulus clouds with dry ice
   
9. The atom was split by a proton beam on a lithium target, by two physicists, Englishman Sir John Douglas Cockcroft and Irishman Errnest Walton
   
10. The sound of a human voice was, for the first time ever, transmitted beyond the ionosphere and returned to Earth after reflecting off the moon.
    
11. The first commerical telephone conversation over a satellite took place over Early Bird I between America and Europe.
    
12. The world's largest gem-quality diamond was discovered  in the Premier mine in Transvaal. It weighed 3,106 carats, or about 1-1/3 pounds, and was named the Cullinan Diamond.
    

You can check your answers for this puzzle on Geochecker.com.

That's all you need to know...