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.
Even as she formed the National Federation of Afro-American Women and became a part of the NAWC, Ruffin remained a member of white womenâs clubs, a matter which revealed the unyielding split between race and gender when the General Federation of Womanâs Clubs met in Milwaukee in 1900 and Ruffin was permitted to represent the white womenâs clubs she belonged to, but not the black womanâs club, New Era.