66K views · 947 reactions | Photo 51 is the famous image created by Rosalind Franklin, which is an x-ray diffraction image. You can get almost the same pattern by shining laser light through the filament of an incandescent light bulb which shows the link between photo 51 and the helical structure of DNA. | Steve Mould | Facebook

48K views · 444 reactions | 140 years ago, on January 27, 1880, Thomas Edison received the patent for his incandescent lamp—the light bulb. | American Experience | PBS | Facebook