Millennium: 3rd millennium Centuries: 20th century 21st century 22nd century Decades: 1990s 2000s 2010s 2020s 2030s 2040s 2050s Years: 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029

The 2020s or "twenty twenties" is the decade that will begin on January 1 2020 and will end on December 31 2029. It is the third decade of the 21st century and the 3rd millennium. Notable predictions and known events The interaction of the three main decadal solar cycles suggests an upcoming reduction in solar activity with a low-energy period centered around 2020.1 As suggested by John Maddox of Nature this might mitigate the global warming (at least temporarily) in the 2010s and 2020s.2 Assuming that the Atlantic multidecadal oscillation runs through an 70-year quasi-cycle (after peaks in 1880 and 1950) its current warm phase is likely to peak during this decade.34 Each of ESA (Europe)5 CNSA (China)6 FKA (Russia)7 and ISRO (India)8 plan to send a manned mission to the Moon in this decade. According to a report released by the National Intelligence Council the United States will experience the relative decline of its economic and military power driven both by the rise of new behemoths such as China India and the EU and by domestic constraints on its global leadership.9 Voyager 2 is expected to stop transmitting back to Earth in the 2020s.10 Futurist Ray Kurzweil puts 2029 as the year most likely for a breakthrough in Artificial General Intelligence (AGI). He expects that around this time computers will reach human intelligence levels and shortly thereafter surpass the capabilities of the human brain.11 Intel predicts the performance of supercomputers to reach zettaflops scale by 2029.12 By the end of the decade world population is projected to surpass 8 billion people half a billion more than 2020 representing a slowdown in growth from the '10s which are expected to increase the population by 700 million.13 In popular culture The majority of the Star Trek: Deep Space Nine two-part story "Past Tense" takes place between August 30 and September 3 2024. Half-Life 2 takes place between May 15 202X and May 30 202X. Deus Ex: Human Revolution takes place in the year 2027. The science fiction series Fringe season three finale "The Day We Died" takes place around May 20 2026. Power Rangers SPD takes place in the year 2025. References Berger Wolfgang H.; et al. (2002). "A Case for Climate Cycles: Orbit Sun and Moon". Climate development and history of the North Atlantic realm. Berlin: Springer. pp. 101123. ISBN 3540432019.  Maddox John (1995). "Natural antidote to global warming". Nature 377 (6546): 193. doi:10.1038/377193a0.  Curry Judith A. (2008). "Potential Increased Hurricane Activity in a Greenhouse Warmed World". In MacCracken Michael C.; Moore Frances; Topping John C.. Sudden and disruptive climate change. London: Earthscan. pp. 2938. ISBN 1844074781. "Assuming that the AMO continues with a 70-year periodicity the peak of the next cycle would be expected in 2020 (70 years after the previous 1950 peak)."  Enfield David B.; Cid-Serrano Luis (2010). "Secular and multidecadal warmings in the North Atlantic and their relationships with major hurricane activity". International Journal of Climatology 30 (2): 174184. doi:10.1002/joc.1881.  Kluger Jeffrey (November 13 2008). "40 Years Later It's Moon Race 2.0". Time. http://www.time.com/time/magazine/article/09171185887800.html.  "China considering manned lunar landing in 2025-2030". Xinhua. May 24 2009. http://news.xinhuanet.com/english/2009-05/24/content11425131.htm.  Page Lewis (October 31 2007). "Russia plans 2025 Moonbase 2035 Mars shot". The Register. http://www.theregister.co.uk/2007/08/31/russiansonmoonby2025/.  Singh Harmeet Shah (July 17 2009). "India's space odyssey: Moon dreams move east". CNN. http://edition.cnn.com/2009/WORLD/asiapcf/07/15/india.space/.  Finn Peter; Pincus Walter (2008-11-21). "Report Sees Nuclear Arms Scarce Resources as Seeds of Global Instability". Washington Post. http://www.washingtonpost.com/wp-dyn/content/article/2008/11/21/AR2008112100091.html.  "Voyager Spacecraft Spacecraft Lifetime". NASA Jet Propulsion Laboratory. 2003-01-14. http://voyager.jpl.nasa.gov/spacecraft/spacecraftlife.html. Retrieved 2007-11-04.  Briggs Helen (2008-02-16). "Machines 'to match man by 2029'". BBC News. http://news.bbc.co.uk/2/hi/7248875.stm.  "IDF: Intel says Moore's Law holds until 2029". Heise Online. 2008-04-04. http://www.heise.de/english/newsticker/news/106017.  see various projections and sources at World population estimates