Atmosphere of Earth sublimated into polar-mesospheric noctilucent clouds. These are the highest clouds in the atmosphere and may be visible to the naked eye if sunlight reflects off them about an hour or two after sunset or a similar length of time before sunrise. They are most readily visible when the Sun is around 4 to 16 degrees below the horizon. Lightning-induced discharges known as transient luminous events (TLEs) occasionally form in the mesosphere above tropospheric thunderclouds. The mesosphere is also the layer where most meteors burn up upon atmospheric entrance. It is too high above Earth to be accessible to jet-powered aircraft
The World We Live In (Life magazine) and Joiners of America to contribute $75,000 in memory of W. L. Hutcheson". The forest was renamed the Hutcheson Memorial Forest. Paleontologist Bob Bakker mentions Zallinger's dinosaurs as the spark that ignited his passion for prehistory; ironically, Bakker himself would later argue against Zallinger's rendition. George Olshevsky also cites "The World We Live In" as introducing him to science, and adds that he suggested authoring an updated version; however, "Life"'s editors were not interested. "The World We Live In "was also the basis for a science series by the German comic book Mosaik. "The World We Live In" was followed