On July 20, 1969, Apollo 11 landed on the lunar surface, making American astronauts Neil Armstrong and Buzz Aldrin the first humans to walk on the moon. Armstrong was the first to touch toe, and he meandered about for two and a half hours outside the spacecraft.

The first Earth Day on April 22, 1970, launched the modern environmental movement and spurred the passage of several important environmental laws. People took part in marches, teach-ins, rallies, and speeches across the country.

Henrietta Lacks was a 31-year old woman from the Baltimore area who died from ovarian cancer back in 1951. Some cells from her body were taken, without her family's consent, by medical researchers shortly before she died.