What was Einstein's miracle year?
In 1905, often called Albert Einstein's "miracle year," he published four groundbreaking papers, including special relativity and the idea behind E=mc².
Reference: Smithsonian Magazine
In 1905, often called Albert Einstein's "miracle year," he published four groundbreaking papers, including special relativity and the idea behind E=mc².
Isaac Newton built the first practical reflecting telescope in 1668, using a curved mirror instead of lenses to gather light.
Sulfur dioxide is a colorless gas with a suffocating, choking odor. It is toxic to humans and concentrations as low as 8 ppm will produce coughing. Incredibly, in the Odyssey, Homer describes the burning of sulfur (formation of SO2) as a way that homes were 'fumigated'.