2–14 December – COP24 United Nations Climate Change conference in Katowice. 3 December – NASA reports the arrival of the OSIRIS-REx spacecraft to the carbonaceous asteroid Bennu after a two-year journey.[452] 5 December Researchers create a new algorithm, based on deep learning, that is able to solve text-based CAPTCHA tests in less than 0.05 seconds.[453] Scientists in the United Kingdom announce completion of the 100,000 Genomes Project.[454] Research published by the Global Carbon Project shows record high carbon emissions of 37.1 billion metric tons in 2018, driven by a booming market for cars and ongoing coal use in China.[455][456][457]