“Pyramid of Giza (Egypt) - years old. Planetary alignment that will take place Dec 2012 is dead-on alignment with the Pyramids at Giza. Night Sky in Giza, Egypt on December local time … one hour before sunrise compared with the Pyramids at Giza.
How cold is the coldest place in the Universe, that we know of? What's the lowest man-made temperature ever achieved? And just how many zeroes are needed to express 'absolute hot', after which the fundamentals of conventional physics start to break.
How big is the universe? This infographic, designed by Number Sleuth, visualizes the size of the universe and its contents by allowing you to scroll down from the very largest known objects to the smallest and compare their relative sizes. Each row in t