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What are gravitational waves?
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The detection of gravitational waves is a major discovery in astrophysics that reinforces the genius of Albert Einstein. Professor of physics Brian Greene explains.
04:46 - Source: CNN
Amazing discoveries of the 2010s 22 videos
prof brian green gravitational waves explained cnni mann intv_00034625.jpg
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What are gravitational waves?
04:46
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On the heels of the discovery of the oldest human remains ever found outside of Africa, here are some other fascinating archaeological finds of the past few years.
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Five amazing finds from the ancient world
01:11
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Exoplanets named after beer
02:41
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Dinosaur amber 2
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First preserved dinosaur tail found
00:58
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01 kepler discoveries
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NASA's record-breaking planet discovery
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A photo illustration shows the first interstellar asteroid: `Oumuamua. This unique object was discovered on 19 October 2017 by the Pan-STARRS 1 telescope in Hawai`i. Subsequent observations from ESO's Very Large Telescope in Chile and other observatories around the world show that it was travelling through space for millions of years before its chance encounter with our star system. `Oumuamua seems to be a dark red highly-elongated metallic or rocky object, about 400 metres long, and is unlike anything normally found in the Solar System.
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Here is the first observed interstellar object in solar system
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Neutrons collide 3
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Star collision scatters gold and platinum (2017)
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Expedition 46 Commander Scott Kelly of NASA rest in a chair outside of the Soyuz TMA-18M spacecraft just minutes after he and Russian cosmonauts Mikhail Kornienko and Sergey Volkov of Roscosmos landed in a remote area near the town of Zhezkazgan, Kazakhstan on Wednesday, March 2, 2016 (Kazakh time). Kelly and Kornienko completed an International Space Station record year-long mission to collect valuable data on the effect of long duration weightlessness on the human body that will be used to formulate a human mission to Mars. Volkov returned after spending six months on the station. Photo Credit: (NASA/Bill Ingalls)
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Space travel altered Kelly's chromosomes
00:57
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neutrino
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Origin of 'ghost particle' found
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Cassini's biggest moments and discoveries
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The Event Horizon Telescope (EHT) -- a planet-scale array of eight ground-based radio telescopes forged through international collaboration -- was designed to capture images of a black hole. Today, in coordinated press conferences across the globe, EHT researchers reveal that they have succeeded, unveiling the first direct visual evidence of a supermassive black hole and its shadow. This breakthrough was announced in a series of six papers published in a special issue of The Astrophysical Journal Letters. The image reveals the black hole at the center of Messier 87, a massive galaxy in the nearby Virgo galaxy cluster. This black hole resides 55 million light-years from Earth and has a mass 6.5-billion times that of the Sun.
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How the first photo of a black hole was captured
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Hiding in plain sight
03:14
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Scientists confirm 'God Particle' exists
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Trappist-1 system
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What is an exoplanet?
01:18
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nasa ocean world Cassini Enceladus sot_00013823.jpg
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NASA's new evidence on ocean worlds
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proxima b orbits cnni mann intv_00005925.jpg
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Could humans live on newly discovered exoplanet?
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Scientists extract woolly mammoth blood
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Liquid body fluids have been found inside a prehistoric 42,000 year old foal.
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Liquid blood and urine found inside 42,000-year-old foal
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human ancestor species discovered south africa mckenzie pkg_00002221.jpg
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Homo naledi: Scientists find ancient human relative
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neanderthals allergies
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Got allergies? You can blame the Neanderthals
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Organic matter found on Mars
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Evidence of water on Mars
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