In order to produce grapes in the most efficient way, winemakers need to know how the harvest is growing and how much water it needs. The GrapeLook service of the European Space Agency (ESA) can help find the answer using satellites.
A team of chemists from the University of Utah (USA) has just shown that water does not freeze completely until it reaches -13ºC and not at 0ºC as we usually think. It is at this extremely low temperature that water not only cools but its molecular structure changes and acquires tetrahedral forms, in which each water molecule joins four others, forming ice.
In the crust of Europa, one of Jupiter's moons, there is water in a liquid state with a volume similar to that of the Great Lakes of North America, according to a team of researchers from the University of Texas at Austin (United States). The finding has been published in Nature and would be a "significant" step in the search for life outside Earth, according to experts.
To the strange nature of one of the seemingly simpler chemical compounds, water, a new rarity has just been added. Scientists have discovered that when it is cooled below freezing, water can transform into a new type of liquid. Details appear in the American Chemical Society's (ACS) Journal of Physical Chemistry B.
A team of astronomers has detected for the first time around a nascent solar system an extensive cloud of water vapor cool enough to form comets that could deposit oceans on dry planets. It lies within the planet-forming disk surrounding the star TW Hydrae, 176 light-years away in the constellation Hydra, and contains volumes of water equivalent to thousands of Earth's oceans.
An international team of astronomers has identified in Comet Hartley 2, belonging to the Kuiper Belt, water with the same chemical composition as the Earth's oceans. The finding supports the theory that comets brought to our planet a significant portion of the water from the oceans, which scientists estimate formed about eight million years after Earth itself.
Throughout the day we ingest food and fluids that we eliminate in various ways. For example, we normally expel 1400 milliters a day in our urine. In addition, throughout the day carbon dioxide and water vapor are sent to the lungs, so that we usually eliminate 350 ml of water through the lungs every day.
ESA's Mars Express probe has sent new images of a crater called Eberswalde that show what may have been the bed of a large lake at the time when water flowed across the surface of the neighboring red planet, the agency announced. space.
Danni Büchner is invited to Sam Dylan's Halloween party. But the "Goodbye Germany" emigrant has no desire for many other party guests. And find clear words.
