Scientific news in small doses

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A few milligrams of all the science news of the week. Posted at 7:00 am Mathieu Perreault La Presse Astronomie Another private Mars mission Two Californian companies want to beat SpaceX in their Martian ambitions. While Elon Musk’s company plans to land a probe on the red planet in 2030, Relativity Space and Impulse Space announced in mid-July that they will get there in 2025. The former would build a 3D-printed rocket, Terran R, which received the US. $1 billion in funding; the second is working on a Mars lander and rover. Relativity Space, founded in 2015, works with NASA and the US Air Force. Next year, SpaceX will have to do a first orbital test of its rocket to reach the Moon and Mars, Starship. The quiz What secret of pollination have French biologists discovered? PHOTO CERTIFIED BY CRNS Idotea balthica Pollination would have appeared in the sea rather than on land. Researchers at the National Center for Scientific Research have discovered that a crustacean, Idotea balthica, propagates the male reproductive cells of the red Breton alga Gracilaria gracilis, which until now were thought to travel with the current. This is the first marine animal pollination ever observed. Since algae appeared long before insect-pollinated plants on earth, this means that the pollination mechanism would have appeared millions of years earlier, the French biologists proposed in mid-July in Science. The first pollinated plants on earth appeared between 65 and 100 million years ago. The number is 9,000 years ago WIKIMEDIA COMMONS Milking a cow in Libyan rock carvings 6,000 to 8,000 years ago This is the time when the common consumption of milk from domesticated animals began in Europe, according to British palaeontologists. However, the mutation that allows milk to be digested well did not spread to Europe until 6,000 years later. The University of Bristol researchers came to this result by combining analyzes of pottery fragments and food residues from 554 archaeological sites with the genome of 1,800 prehistoric and modern individuals. This means that the milk digestion gene did not spread in response to increased milk consumption, as previously believed, the paleontologists wrote in Nature in late July. Discovery The first mosques PHOTO FROM THE ISRAEL ANTIQUITIES AUTHORITY WEBSITE Seventh-century mosque site discovered in the Negev desert One of the first mosques built outside of Mecca was discovered one day in the Negev desert , Israel. It is believed to date from the conquest of Byzantine Palestine by the second caliph, Omar, in 636. Along with a similar rural mosque found nearby in 2019, these are the first mosques built by local communities, not warlords in the newly conquered cities, such as the al-Aqsa mosques in Jerusalem (637) and Amr ibn al-As in Cairo (641). Archaeologists from the Israel Antiquities Authority, detailing their excavations in a press release, now want to determine whether they are local converted populations or newcomers who occupied the lands abandoned by Christians from neighboring monasteries, dated of the sixth century and abandoned in the sixth century. the seventh century. Astronomy Chinese Asteroid Parade SCIENCE MAGAZINE ICARUS WEBSITE IMAGE Artist’s impression of Chinese asteroid impactor project SCIENCE MAGAZINE ICARUS WEBSITE IMAGE Chinese Asteroid Impactor Project 1/2 China to launch a mission anti-asteroid in 2026, the head of the Long March Rocket Program, Long Lehao, announced at a conference. The target would be asteroid 2020 PN1, whose trajectory would be altered by an impact, says Space News, which translated the video from Chinese Space Mandarin. China held its first planetary asteroid defense conference last fall. The impactful project, previously described in the Icarus review, was presented there. 2020 PN1 is between 10 and 50 meters in diameter, comparable to the asteroid that injured 1,500 people in Siberia in 2013.
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