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Humans reached outer space mediated in 1944 and have sustained mediated presence since 1958 , [a] as well as having reached space directly for the first time on 12 April 1961 (Yuri Gagarin) and continuously since the year 2000 with the crewed International Space Station (ISS), or since the later 1980s with some few interruptions through crewing ...
The first space rendezvous was accomplished by Gemini 6A and Gemini 7 in 1965.. Records and firsts in spaceflight are broadly divided into crewed and uncrewed categories. Records involving animal spaceflight have also been noted in earlier experimental flights, typically to establish the feasibility of sending humans to outer space.
The first uncrewed spacecraft, Shenzhou 1, was launched on 20 November 1999 and recovered the next day, marking the first step of the realization of China's human spaceflight capability. Three more uncrewed missions were conducted in the next few years in order to verify the key technologies.
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
See Stephen Hawking through the years: Hawking goes on to warn , "I believe that life on Earth is at an ever-increasing risk of being wiped out by a disaster, such as a sudden nuclear war, a ...
First human-made signals from space. USSR Sputnik 1: 3 November 1957: First mammal in orbit, the dog Laika. USSR Sputnik 2: 31 January 1958: Confirmed existence of the Van Allen radiation belt. USA Explorer 1: 17 March 1958: First use of solar power in space. The oldest artificial object still in space. USA Vanguard 1: 4 January 1959
The three forces of the Standard Model are still unified (assuming that nature is described by a Grand Unified Theory, gravity not included). Inflationary epoch Electroweak epoch < 10 −32 s: 10 28 K ~ 10 22 K (10 15 ~ 10 9 GeV) Cosmic inflation expands space by a factor of the order of 10 26 over a time of the order of 10 −36 to 10 −32 ...
A Homo fossil was found near some Oldowan tools, and its age was noted at 2.3 million years old, suggesting that maybe the Homo species did indeed create and use these tools. It is a possibility but does not yet represent solid evidence. [195]