In 1875 the remains of a prehistoric crocodile were found in the brown coal mine at Messel near Darmstadt; since then a large number of well preserved fossils have also been discovered. Palaeontologists have long puzzled over what could have been the reason for this annihilation of so many creatures. In the latest issue of the Paläontologische Zeitschrift (‘Journal of Palaeontology’) researchers from the University of Bonn have put forward a new theory: the cause of the deaths of these animals may have been poisoning by cyanobacteria.
The fossil site of Messel, near Darmstadt (central Germany) is a world heritage site; it is famous throughout the world for the fossils of animals and plants from a tropical landscape 47 million years ago, all of them excellently preserved. Nowhere else have so many bats and birds been found in lake deposits. Among the mammals even the contents of the stomach are usually preserved. But how did these animals die? The well-filled stomachs are not exactly an indicator of disease or fatal debility. Until recently the cause of death was assumed to be, inter alia, gases of volcanic origin which may have collected over the lake. This might explain why the animals suffocated. But such clouds of gas – if they indeed existed – must have dispersed rapidly, given the size of the lake. It is still a moot point whether, after hundreds of thousands of years, gas was still escaping from the volcanic subsoil which formed the extinct volcanic crater lake of Messel.
The University of Bonn palaeontologists on Professor Wighart von Koenigswald’s team have proposed a new theory in the latest issue of the Paläontologische Zeitschrift which sheds light on the possible cause of death. While examining the fossils the researchers became aware that the deaths must have occurred at the same time of year in different years. The five pregnant mares which were found at completely different levels in the oil shale at Messel all died at the same time of year, as the foetuses were at the same stage of development. Among the tortoises there were also five pairs which died during copulation, i.e. during the breeding season.
Prof. Wighart von Koenigswald | alfa
More than 100 years of flooding and erosion in 1 event
28.03.2017 | Geological Society of America
Satellites reveal bird habitat loss in California
28.03.2017 | Duke University
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
28.03.2017 | Life Sciences
28.03.2017 | Information Technology
28.03.2017 | Physics and Astronomy