Deepest known spot on the planet at 10916 m. Situated just north of Papua New Guinea. Has been visited four times by humans - first visit in 1960 by the submarine Trieste. No known animals live here.
Philosophy united in man's confusion in the face of a meaningless world. Søren Kierkegaard known to be first existentialist; "life is not a problem to be solved, but a reality to be experienced."
Called "the father of modern philosophy," Descartes (1596-1650) was a polymath who made significant contributions in multiple fields. His most famous philosophical dictum is "I think, therefore I am."
Cluster of telescopes in California dedicated to search for extraterrestrial intelligence. Currently exploring possibility of alien intelligence in Cygnus constellation, 1,500 lightyears from earth.
False dusk/dawn. Best seen during fall or spring. Sunlight reflecting off dust grains circulating the sun. Grains thought to be left over from the creation of our solar system 4.5 billion years ago.
Earthlike planet 20 lightyears away. Tidally locked to its star, one side experiencing eternal daylight and one eternal darkness. Not too cold nor too hot, could contain life similar to that of earth.
Planet made up of 400°C hot ice. Extreme gravity keeps water solid despite heat. Not fit for life but brings hope to find habitable planets in similar solar systems. 30 light years away from earth.