The first outbreak of the evolution of multicellular organisms falls on the Wend, the last period of the Proterozoic (Precambrian), about 620-550 million years ago. At that time, climate of our planet was rather cold, and glaciers that covered the single supercontinent nearly reached the equator. The cold is beneficial for the evolution of sea creatures.
In modern seas, significant concentrations of dissolved oxygen, phosphates, and the organic matter provide for a high biological productivity and the appearance of very large animals. In ancient times, the situation was probably similar: first multicellular organisms lived in cold seawater.
As is known, there was a sharp increase in the fauna diversity in the Cambrian Period. However, in the preceding period, Wend, the fauna was rather rich too, as said Mikhail A. Fedonkin in his report of October 17 in the Vavilov Institute of General Genetics (Moscow). Fedonkin is the corresponding member of the Russian Academy of Sciences and the head of the Laboratory of Precambrian Organisms in the Paleontological Institute in Moscow.
Mrs. Elena Kleschenko | alfa
Nesting aids make agricultural fields attractive for bees
20.07.2017 | Julius-Maximilians-Universität Würzburg
The Kitchen Sponge – Breeding Ground for Germs
20.07.2017 | Hochschule Furtwangen
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