New Research Indicates That Light Therapy May Slow Cardiovascular Aging
Second 'Giant Hole' Appears on Sun: Solar Winds to Hit Earth This Week
In 1868 Pierre Janssen watched the moon pass in front of the Sun. Using a special prism, he became obsessed with a line of yellow light that everyone assumed was sodium so he kept studying that mysterious line. Joseph Lockyer worked on the same problem and both are credited for helium