Monday , May 10 2021

First stories: the darkest year in the Earth, the mistakes in the oceanic study and a new crater under the ice of Greenland Science


By Frankie Schembri

Because 536 was "the worst year to be alive"

After analyzing the ice cream volcanic glass particles of a Swiss glacier, a team of researchers identified why some medieval historians said that 536 was the worst year to be alive. Earlier that year, a cataclysmic volcano in Iceland launched ash throughout the northern hemisphere, creating a fog that plunged Europe, the Middle East and parts of Asia into dark night and overnight for 18 months. Summer temperatures dropped 1.5 ° C to 2.5 ° C, starting the coldest decade in the last 2300 years.

High-profile ocean warming paper to obtain a correction

Scientists behind a major study on ocean warming this month are recognizing errors in their calculations and claim that the conclusions are not as true as it was first reported. The research, published in NatureHe said the oceans are heating much faster than previously estimated. After a blog marked some discrepancies in the study, the authors said they would send a correction to the magazine.

The massive crater under the ice of Greenland points to a climate impact on human time

An international team of scientists this week reported the discovery of an impact crater 31 kilometers long hidden below the ice sheet of Greenland, after a 1.5-kilometer asteroid hit the Earth. One of the 25 best-known craters on the planet, is also remarkably cool, apparently indicating a recent strike in the last millions of years. The calendar is still about to be debated, but some researchers from the discovery team believe that the asteroid reached a crucial moment: about 13,000 years ago, as well as the world thawed from the last ice age.

Do intestinal bacteria make a second home in our brains?

In the annual meeting of the Society for Neuroscience in San Diego, California last week, the neuroanatomer Rosalinda Roberts splashed a presentation of the results of her laboratory at the University of Alabama in Birmingham, where bacterial spots were seen inhabiting healthy brain cells human collected from corpses. Roberts was careful to observe that his team did not rule out the possibility of sample contamination, but the results are one of several preliminary indications that bacteria can directly influence the processes in the brain.

A large and strangely toasted galaxy found the scavenger at the end of the Milky Way

Astronomers have discovered a dwarf galaxy, called Antlia 2, which is a third of the size of the Milky Way itself that is at the end of our galaxy. As big as the Great Cloud of Magellan, the biggest galaxy companion, Antlia 2 has eluded detection so far because it is 10,000 times weaker. A strange beast defies models of galaxy formation and dark matter, the invisible material that helps to join the galaxies.

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