I seriously doubt any one will ever know, many men tried, many men failed there is no record of all the hobbyists or half drunken attempts so we can't know for sure. Interesting piece of information; no Thomas Edison did not invent the light bulb; he stole literally stole the progress from Sir Hiram Maxim and used his political ties in Paris to halt the Patton process of Maxim while Edison created the light bulb, Maxim did however create the world first modern machine gun from a Henry repeater rifle the machine gun is called the Maxim gun.
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Not a "number." Energy is the speed of light squared times mass, so E = mc2.
cubes made of straws or spaghetti
5,865,696,000,000 is the approximate number of miles light travels in one year.
Light travels in straight lines and therefore some will hit the tree. Where this happens a shadow (absence of light) is created behind the tree.
Light my Fire.