2020 in science


A number of significant scientific events occurred in 2020.

Events

August

October

November

December

  • 1 December
  • *The Arecibo Telescope collapses after several hurricanes, storms, and earthquakes over the 2010s raised concerns over the stability of the Arecibo Observatory and two cable breaks in August and November led teams of engineers to assess a high risk of collapse. One of the three teams determined there to be no safe way to repair the damage due to which the NSF announced the decision for a controlled decommissioning of the telescope on November 19, a few days before the collapse, which was challenged by scientists worldwide who, with a public petition subsequent to this announcement, asked for it to be repaired instead. The telescope built in 1963 was Earth's largest single-aperture telescope until 2016 and the source technology for many significant scientific discoveries, SETI as well as of the 1974 Arecibo message.
  • *The Chinese experimental nuclear fusion reactor HL-2M is turned on for the first time, achieving its first plasma discharge.
  • 2 December
  • *The World Meteorological Organization reports that 2020 is likely among the three warmest years on record globally, at 1.2 °C above the pre-industrial level. The ten years from 2011 to 2020 are also reported to be the warmest decade on record.
  • *Scientists report finding microplastics in the placentas of women with unborn babies for the first time. These may have negative effects on the fetal development.
  • *The world's first regulatory approval for a cultivated meat product is awarded by the Government of Singapore. The chicken meat was grown in a bioreactor in a fluid of amino acids, sugar, and salt. The chicken nuggets food products are ≈70% lab-grown meat, while the remainder is made from mung bean proteins and other ingredients. The company pledged to strive for price parity with premium "restaurant" chicken servings.
  • *Scientists confirm 2020 SO to be rocket booster space junk.
  • 3 December
  • *Chinese researchers claim to have achieved quantum supremacy, using a photonic up to 76-qubit system known as Jiuzhang, which performed calculations at 100 trillion times the speed of classical supercomputers.
  • *Scientists report that repurposed Molnupiravir can completely suppress SARS-CoV-2 transmission within 24 hours in ferrets whose COVID-19 transmission they find to closely resemble SARS-CoV-2 spread in human young adult populations.
  • 8 December
  • *Samples preserved for an estimated 4.6 bn years collected from asteroid 162173 Ryugu with the Japanese spacecraft Hayabusa2 are retrieved on Earth. The capsule containing the two samples becomes the second retrieved pristine asteroid sample a decade after Hayabusa collected the first and includes sub-surface dust. It was sent off from 220 million km away with the spacecraft proceeding on a 2026 and 2031 route to two asteroids.
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  • 9 December
  • *The Washington Post reports a serious warning for people with a "significant" history of allergies and the possibility of "anaphylactoid reactions" regarding the Pfizer COVID-19 vaccine.
  • *Scientists report the detection of large-scale X-ray bubbles in the Milky Way halo.
  • *A study finds there to be no direct causal relationship between the proportionally most comparable mass radiations and extinctions, substantially challenging the hypothesis of such creative mass extinctions.
  • 10 December
  • *A proof of concept study – published as a preprint and sent to a journal in June – indicates that sniffer dogs are highly effective in detecting the presence of SARS-CoV-2 in samples of human sweat with two colon-cancer trained dogs achieving success rates of 100% in their 68 tests. Research projects on dogs in COVID-19 screening were reported as early as July and also indicated potential efficacy. At least one trial with publication of results scheduled for early 2021 is ongoing.
  • *Scientists report that four months old ravens can have physical and social cognitive skills similar to that of adult great apes in tests.
  • 11 December
  • *Astronomers report that orbital motion for HD 106906 b was detected. This may be useful for attempts to predict the semi-major axis of the hypothetical Solar System object called Planet Nine.
  • *A human thymus rebuilt using stem cells and a bioengineered scaffold is demonstrated.
  • *A supercomputer simulation of planetary climate feedbacks vaguely suggests that chance – in terms of likeliness after known initial conditions – played a substantial role in Earth's thermal habitability lasting over 3 bn years.
  • *The first whole-genome comparison between chimpanzees and bonobos is published and shows genomic aspects that may underlie or have resulted from their divergence and behavioral differences, including selection for genes related to diet and hormones.
  • 14 December
  • **Authorities of the United Kingdom report the detection and analysis of SARS-CoV-2 variant of Concern 202012/01 with an apparent increased transmissibility to the WHO.
  • **On 18 December South African officials announce the detection of the 501.V2 variant with an apparent increased transmissibility.
  • **These two variants of SARS-CoV-2 are reported to have spread worldwide as of December 30.
  • **On 23 December Malaysian officials announce the detection of similar variant 'A701B'.
  • **On 24 December African Union officials announce the detection of non-similar variant B.1.1.207 in Nigeria without a confirmed association with increased transmission of the virus in the country at the time.
  • 15 December - An analysis of external climate costs of foods indicates that external greenhouse gas costs are typically highest for animal-based products – conventional and organic to about the same extent within that ecosystem subdomain – followed by conventional dairy products and lowest for organic plant-based foods and concludes contemporary monetary evaluations to be "inadequate" and policy-making that lead to reductions of these costs to be possible, appropriate and urgent.
  • 16 December
  • *For the first time, astronomers may have detected radio emissions from a planet beyond the Solar System. According to the researchers: "The signal is from the Tau Boötes system, which contains a binary star and an exoplanet. We make the case for an emission by the planet itself." Radio wave emissions may become a new way for examining exoplanets.
  • *The Chinese Chang'e 5 spacecraft return a lunar sample, which marks the first lunar sample-return mission conducted since 1976. The Orbiter proceeded on a mission to carry out observations at Sun-Earth Lagrange point L1 after dropping the sample off to Earth.
  • 18 December
  • *Media outlets report that astronomers detected a radio signal, BLC1, apparently coming from the direction of Proxima Centauri, the closest star to the Sun. Astronomers have stated that this and other, yet unpublished, signals, "are likely interference that we cannot fully explain" and that it could be the strongest candidate for an extraterrestrial radio signal since the "Wow! signal" of 1977.
  • **A paper by other astronomers released 10 days before the news report about BLC1 reports the detection of "a bright, long-duration optical flare, accompanied by a series of intense, coherent radio bursts" from Proxima Centauri also in April and May 2019. Their finding has not been put in direct relation to the BLC1 signal by scientists or media outlets so far but implies that planets around Proxima Centauri and other red dwarfs are likely to be rather uninhabitable for humans and other currently known organisms.
  • *Ecologists report that the driest and warmest sites of 32 tracked Brazilian non-Amazon tropical forests have moved from carbon sinks to carbon sources overall 2013.
  • *Researchers report a deep learning approach to identify gene regulation at the single-cell level, which previously had been limited to tissue-level analysis.
  • 21 December
  • *Jupiter and Saturn come within a 6' arc, giving a rare telescopic view of the two so close together. As the two planets have an apparent size smaller than one arc minute, occultations are extremely rare: this is the closest approach since 1623 and the next occultation will happen in the year 7541.
  • *Publication of research of "counterfactual quantum communication" – whose first achievement was reported in 2017 – by which information can be exchanged without any physical particle traveling between observers and without quantum teleportation. The research suggests that this is based on some form of relation between the properties of modular angular momentum.
  • *Researchers publish projections and models of potential impacts of policy-dependent modulation of how, where, and what food is produced.
  • 22 December
  • *More than 109,000 new craters are identified in the low- and mid-latitude regions of the Moon using artificial intelligence.
  • *A new mineral, dark green in colour and named kernowite, is discovered in Cornwall, South West England.
  • 23 December - A study finds that face masks reduce the risk of spreading large COVID-19-linked droplets when speaking or coughing by up to 99.9 percent.
  • 30 December - Scientists report finding microvascular blood vessel damage in tissue samples of brains without any detected SARS-CoV-2 as well as olfactory bulbs from patients who died from COVID-19.
  • 31 December - Scientists determine that desalination membranes are inconsistent in density and mass distribution, and show a way to increase efficiency in the membranes by up to 40%.

Awards

Reinhard Genzel and Andrea Ghez for the discovery of a supermassive compact object at the centre of our galaxy

Deaths