mountain where there is only one-third of the oxygen found at sea level. number five, a scientific event of intergalactic magnitude. the first photo of a black hole. the black scholes are the most miss theerrious object in the universe. it prevents light from escaping. located 55 million light years away in a galaxy m-87. another black hole voter the moment dait katie bowman showed the massive phenomenon. to see it, scientists in multiple companies around the world linked local telescopes to create this virtual observatory. predictably. twitter couldn t ska ep the donut memes. four, a catastrophic fire shocked the world. the historic notre dame cathedral is engulfed in fire. the iconic 856-year-old