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.
STEVENS, JOHN. John Stevens (1749â1838) was an engineer and inventor who was one of the earliest U.S. experimenters with steamboats. He built his career on promoting better transportation, not only with steamboats but also with railroads. Stevens built the first steam-powered locomotive in the United States.