Genius Optical Inventions: From the X-Ray to the Telescope

Genius Optical Inventions: From the X-Ray to the Telescope — page 3
INTO THE LIGHT When our early ancestors first learned to make fire and control it they altered human destiny Now able to make light and heat they no longer had to go to bed at sundown They could stay warm at night and cook food No more raw meat 3D projector 1890s Eating better food may have even been a trigger that led to our larger brain size making us more clever Fire also helped early humans keep pesky bugs and wild beasts at bay And it helped them hollow out canoes for traveling the oceans and finding new land Of course these advances happened a long time ago and we can’t say exactly Magnifying glass bowl at least 2,000 years ago 6