This week, astrobiologists are discussing what ESA`s Huygens spaceprobe might discover when it parachutes to the surface of Saturn`s mysterious moon, Titan, in 2005. Titan possesses a rich atmosphere of organic molecules, which Huygens will analyse. Recently some scientists have begun to think that, by redefining life, in broader terms, what we may find on Titan may be life. If this is the case, it certainly will not be life as we know it...
Titan is an astrobiologist`s dream laboratory. Its atmosphere is composed of nitrogen and methane gas. Ultraviolet light from the Sun can break the methane molecules apart, leading to the formation of complex organic molecules by which scientists mean molecules containing carbon. Carbon compounds are the first step towards life, as we know it on Earth. Life, itself, is based on extremely complicated carbon molecules such as DNA. Some scientists believe the composition of Titan`s atmosphere closely resembles that of early Earth, before life began on our planet.
Huygens`s investigations may reveal how life began on Earth. Jean-Pierre Lebreton, ESA`s Project Scientist for Huygens says, "One of the key questions we hope to address is how complex the organic molecules have grown in Titan`s atmosphere."
However, organic molecules are still a long way from life itself. So, what defines life? What is the difference between the living and the non-living? Scientists are still unsure. No satisfactory definition has been found so far. Any attempt to define life`s characteristics either excludes some types of life or includes some inanimate objects. When looking for an appropriate definition of life, there is one property all scientists seem to agree on: all life needs energy to sustain its metabolism.
Jean-Pierre Lebreton | alfa
First direct observation and measurement of ultra-fast moving vortices in superconductors
20.07.2017 | The Hebrew University of Jerusalem
Manipulating Electron Spins Without Loss of Information
19.07.2017 | Universität Basel
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...
Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
19.07.2017 | Event News
12.07.2017 | Event News
12.07.2017 | Event News
20.07.2017 | Information Technology
20.07.2017 | Materials Sciences
20.07.2017 | Physics and Astronomy