New results show that land-living crabs, descended from marine ancestors, have re-invented key aspects of the insect nose through evolution in order to solve the problem of olfaction in their air-filled terrestrial environment.
The robber crab, Birgus latro, is the world’s largest land-dwelling arthropod, with a weight reaching 4 kg and a length of more than half a meter. Robber crabs are perhaps most famous for their ability to climb tall palm trees in search of coconuts, which they later are able to crack open with their massive claws. These crabs are fully adapted to a life on land and will actually drown if submerged in water. The robber crab’s transition from sea to land has been accomplished through numerous, and in many cases far-reaching, adaptations. A question not previously addressed is how the robber crabs have adapted to olfaction in their new environment – an intriguing question because the sense of smell needs to operate under very different conditions in air compared to water.
In the new work, Marcus Stensmyr and Bill S. Hansson from the Swedish University of Agricultural Sciences, together with colleagues from Lund University, Sweden and the University of New South Wales, Australia, show not only that these impressive crabs have a functional sense of smell but that the olfactory system they have developed is in fact highly sophisticated and sensitive. Moreover, the crabs have managed this evolutionary feat by adopting olfactory strategies similar to those of insects.
Scientists discover new 'architecture' in corn
21.01.2019 | Louisiana State University
Nuclear actin filaments determine T helper cell function
21.01.2019 | Universitätsklinikum Heidelberg
The scientific and political community alike stress the importance of German Antarctic research
Joint Press Release from the BMBF and AWI
The Antarctic is a frigid continent south of the Antarctic Circle, where researchers are the only inhabitants. Despite the hostile conditions, here the Alfred...
World first experiments on sensor that may revolutionise everything from medical devices to unmanned vehicles
The new sensor - capable of detecting vibrations of living cells - may revolutionise everything from medical devices to unmanned vehicles.
Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.
In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...
Cellulose obtained from wood has amazing material properties. Empa researchers are now equipping the biodegradable material with additional functionalities to produce implants for cartilage diseases using 3D printing.
It all starts with an ear. Empa researcher Michael Hausmann removes the object shaped like a human ear from the 3D printer and explains:
The phenomenon of so-called superlubricity is known, but so far the explanation at the atomic level has been missing: for example, how does extremely low friction occur in bearings? Researchers from the Fraunhofer Institutes IWM and IWS jointly deciphered a universal mechanism of superlubricity for certain diamond-like carbon layers in combination with organic lubricants. Based on this knowledge, it is now possible to formulate design rules for supra lubricating layer-lubricant combinations. The results are presented in an article in Nature Communications, volume 10.
One of the most important prerequisites for sustainable and environmentally friendly mobility is minimizing friction. Research and industry have been dedicated...
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21.01.2019 | Life Sciences
21.01.2019 | Physics and Astronomy
21.01.2019 | Life Sciences