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The Lower Paleolithic period lasted over 3 million years, during which there many human-like species evolved including toward the end of this period, Homo sapiens.The original divergence between humans and chimpanzees occurred 13 (), however interbreeding continued until as recently as 4 Ma, with the first species clearly belonging to the human (and not chimpanzee) lineage being ...
2005 YouTube. Born from the PayPal Mafia in 2005, YouTube is the world's most popular video sharing site. In 2006, Google bought YouTube for $1.65 billion. 2006 Blu-ray Disc. A digital optical disc data storage format. It was designed to supersede the DVD format, and is capable of storing several hours of video in high-definition. 2007 Nanowire ...
In April 2009, YouTube launched their earliest HTML5 video player experiments. [74] Throughout 2009, the alphabetical sorting of YouTube's "AudioSwap" feature helped popularizing Alexander Perls' "009 Sound System" music project through frequent use in videos. [75] [76] YouTube XL logo used until 2013. In June 2009, YouTube XL was launched.
From the first Apple computer to the COVID-19 vaccine, here are the most revolutionary inventions that were born in the U.S.A. in the past half-century.
Pages in category "20th-century inventions" The following 126 pages are in this category, out of 126 total. This list may not reflect recent changes. A.
4th century BC: The first true formal system is constructed by Pāṇini in his Sanskrit grammar. [34] [35] 4th century BC: Eudoxus of Cnidus states the Archimedean property. [36] 4th century BC: Thaetetus shows that square roots are either integer or irrational. 4th century BC: Thaetetus enumerates the Platonic solids, an early work in graph ...
The Mars Exploration Rovers have provided vast amounts of information by functioning well beyond NASA's original estimates. Using the Wilkinson Microwave Anisotropy Probe, scientists studying the universe measured that its age is 13.77 billion years; "solidly supported" that it has been expanding and cooling since the Big Bang; and calculated that the universe is composed of about 4.6% atoms ...
Also, by the end of the 20th century, uncrewed probes had visited the Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and various asteroids and comets. The Hubble Space Telescope , launched in 1990, greatly expanded our understanding of the Universe and brought brilliant images to TV and computer screens around the world.