Arctic Ozone Hole. The Ozone Layer The ozone layer is a layer in Earth's atmosphere which contains relatively high concentrations of ozone (O3). This layer absorbs 97-99% of the sun's high frequency ultraviolet light, which is potentially damaging to life on earth.
Nettie Stevens: Scientist Extraordinaire and STEM Icon; a Steampunk Feministâs Perspective Nettie Stevens If you want an example of the true grittiness and resourcefulness of the American spirit, you canât go past Nettie Stevens.
Pinky Johnson (Jeanne Crain) returns to the South to visit Dicey (Ethel Waters), the illiterate black laundress grandmother who raised her. Pinky confesses to Dicey that she passed for white while studying to be a nurse in the North. She had also fallen in love with white Dr. Thomas Adams (William Lundigan), who knows nothing about her black heritage.