Elberta "Berta" S Thompson (born 1908)

In 1908, in the year that Elberta "Berta" S Thompson was born, a mysterious Siberian explosion leveled over 770 square miles of forest. There were no human casualties. Explanations of the explosion have included a comet, meteorite, natural atomic explosion, or a crashed UFO. Although it is called an impact event - the largest one in recorded earth history - there is no crater and it is widely thought that the explosion was caused by a meteor exploding 3 to 6 miles above the earth.

In 1958, on January 31st, Explorer I, the United States' answer to Sputnik I (and 2,) was launched. America had entered the Space Race. The first spacecraft to detect the Van Allen radiation belt, it remained in orbit until 1970.

In 1966, on September 8th, the first Star Trek episode, "The Man Trap," was broadcast on NBC. The plot concerned a creature that sucked salt from human bodies. The original series only aired for 3 seasons due to low ratings.

In 1976, The United States celebrated the Bicentennial of the adoption of the Declaration of Independence. It was a year long celebration, with the biggest events taking place on July 4th.

In 1990, on April 24th, the Hubble telescope was launched into space after long delays due to the Challenger explosion. An optical flaw was found within weeks of launch but was fixed within three years. The discoveries made possible by the Hubble have contributed to scientists' understanding of the universe.