SCIENCE

Spewing water vapour, carbon dioxide, and sulphur dioxide into the air, these explosions tore through the Martian surface about 4 billion years ago, according to scientists' estimates, reported in the journal Geophysical Research Letters. "Each one of these eruptions would have had a significant climate impact -- maybe the released gas made the atmosphere thicker or blocked the Sun and made the atmosphere colder," said Patrick Whelley.

The observations have allowed the team to constrain the 3D shape and mass of this peculiar asteroid, which resembles a dog bone, to a higher accuracy than ever before. Their research also provides clues as to how this asteroid and the two moons that orbit it formed. "Kleopatra is truly a unique body in our Solar System," said lead researcher Franck Marchis.

The study, by scientists at Tel Aviv University in Israel, showed that breathing pure oxygen for some time in a pressurised -- or hyperbaric -- chamber can boost the functioning of the human brain. In animals, the therapy helped fight the build-up of brain plaque, the Times of Israel reported.

Analysis of the rocks from which the Montdenier and Montagnac samples were taken show signs that they were in contact with water for a long period of time, boosting the case for ancient life on the Red Planet. aceIt looks like our first rocks reveal a potentially habitable sustained environment. It's a big deal that the water was there for a long time," said Ken Farley of Caltech.

Welga Ramirez, executive bodyguard and ex-Special Forces, is about to retire early when her client is killed in front of her. It's 2095 and people don't usually die from violence. Humanity is entirely dependent on pills that not only help them stay alive but also allow them to compete with artificial intelligence in an increasingly competitive gig economy.

The agency set the new target launch date in coordination with Arianespace after Webb recently and successfully completed its rigorous testing regimen -- a major turning point for the mission, NASA said in a statement on Wednesday. The new date also follows French company Arianespace successfully launching an Ariane 5 rocket in late July and scheduling a launch that will precede Webb.

Until now, theoretical models considered that these three elements were homogeneously mixed and reached the Solar composition everywhere in our galaxy, with a slight increase in metallicity in the centre, where the stars are more numerous. For 25 hours, a team of scientists observed the atmosphere of 25 stars using Hubble and the Very Large Telescope (VLT) in Chile.

Chairman and Secretary, Department of Space K. Sivan inaugurated two day Lunar Science Workshop 2021 on Monday. He also released Chandrayaan-2 data product and science documents, along with data from Chandrayaan-2 orbiter payloads. The eight payloads onboard Chandrayaan-2 are conducting scientific observations of the Moon by remote sensing and in-situ techniques.

The study, published in the journal Current Biology, showed that humanity may have been exposed to sarbecoviruses -- which has the potential to jump from animals to humans -- since the Paleolithic period -- roughly 2.5 million years ago to 10,000 BC. Despite having a very rapid rate of evolution over short timescales, to survive, viruses must remain highly adapted to their hosts -- this imposes severe restrictions on their freedom to accumulate mutations without reducing their fitness.

"The data received on September 1, from NASA's Perseverance rover, indicates that the team has achieved its goal of successfully coring a Mars rock. The initial images downlinked after the historic event show an intact sample present in the tube after coring," the US space agency said in a statement.