Stephen Hawking's doctoral thesis has been made publicly available online for the first time. The 119-page document submitted by then 24-year old Hawking is titled "Properties of an Expanding Universe", and covers several topics that have echoed through his career such as the origins of the universe, gravitational waves, and singularities.
The achievements made in technology and medicine, even over just the past century,are astounding. Science has accomplished so much and has taken society to new heights by answering both the questions of the time and those we never even knew we had. But, here are some of the questions science still have difficulty answering to this day.
Physicists found that the attractive force between antiprotons is similar to that between protons. Antimatter and matter obey the same law of attraction.
Astrophysicists at the University of Waterloo have created the most detailed 3D map of the universe that spans nearly two billion light years from side to side. It is the most complete picture of our cosmic neighborhood to date.
Breit–Wheeler process as described by Gregory Breit and John A. Wheeler in 1934, is the simplest mechanism ever predicted by which pure light can be transformed into matter.
Explore history on Cosmos, Earth, Life and Humanity at Big History Project.