Phillis Wheatley gained her freedom in 1775. Born probably in Gambia or Senegal, she was sold into slavery when she was seven years old. Purchased by the Wheatley family, she was well-educated. She began writing poetry in 1767. She was emancipated in 1775 when her master died. Children can read some of her works at: Project Gutenberg.
Transistor radio was sold for the first time in 1954. Texas Instruments created the small and portable radio. These radios allowed people to hear music wherever and whenever. Billions of transistor radios were sold during the 1960’s and 1970’s.
James Watson, Francis Crick, and Maurice Wilkins shared the 1962 Nobel Prize for Medicine and Physiology for theorizing the double-helix structure of DNA.