Do sleep duration and bedtime influence the risk of dementia?

Alzheimer’s disease is the most common form of dementiadementiawhose pathophysiological process begins several decades before the appearance of the first symptomssymptoms. Many factors play a role in the development of dementia, some of which may be modifiable such as sleeping troublessleeping troubles. If dementia and sleepsleep are associated, however previous studies report contradictory results. First

Most lakes on Mars have not been identified

If the presence of liquid water in the past of Mars is no longer in doubt, a new study underlines that we are far from having identified the majority of the lakes having existed on the Red Planet. For some time now, and in particular thanks to data collected by Mars rovers, we know that

Mars: a wet planet long before Earth

If the current Martian conditions no longer allow the establishment of oceans on its surface, it was quite different when the planet was formed. A new study suggests that the primordial atmosphere of the Red Planet was particularly dense, rich in water vapor and dihydrogen. Conditions favoring the very rapid appearance of vast expanses of

Fourth day of eruption at Piton de la Fournaise!

Started on September 19 around 8 a.m., the eruption of the Reunionese volcano continues and follows a fairly classic evolution. The activity has stabilized on a few vents around which an eruptive cone begins to build, while the lava flows are spreading towards the southeast. The eruptive flow is modest, but the images are superb,

The James-Webb Telescope observed the great comet Hale-Bopp

Comet C/1995 O1 (Hale-Bopp), a.k.a the Comet Hale-BoppComet Hale-Bopp in short, was observed by James-Webb on July 9, reveals to us the center of the minor planets. The big one cometcomet of 1997”, discovered independently by Alan Hale and Thomas Bopp on July 23, 1995, had not been observed since July 13, 2013. These new

Hunga Tonga’s eruption sent colossal amounts of water into the atmosphere

The Hunga Tonga-Hunga Ha’Apai volcano erupted last January. As all underwater volcanoes do, it ejected water vapor into the atmosphere. As do all underwater volcanoes. But in a colossal amount that amazed the researchers. So much so that they are now asking the question of the possible global consequences for the Planet and its climate.

One more clue that life could exist on this Saturn moon

For many years, Enceladus has attracted the attention of scientists as a candidate world for harboring extraterrestrial life forms. New data reinforces the idea that the ocean hidden under the thick layer of ice of this moon of Saturn would be favorable to the development of life. In search of extraterrestrial life, scientists are particularly