A woman holds up a sign asking for special eclipse sunglasses in the hope of watching a near total solar eclipse, with more than 90 percent of the Sun blocked by the Moon across Britain, on Primrose Hill in London on August 12, 2026. Millions of people will turn their gaze towards the heavens on August 12 to witness one of nature's greatest spectacles -- a rare total solar eclipse -- as it sweeps over mainland Europe to briefly turn day into night. (Photo by Henry NICHOLLS / AFP via Getty Images)