A ratbot takes the pleasure line.
© S. Talwar et al.
Instinct overrides desire at a dangerous height.
© S. Talwar et al.
Desire drives remote-controlled rodents.
Remote-controlled rats could soon be detecting earthquake survivors or leading bomb-disposal teams to buried land mines.
Signals from a laptop up to 500 metres away make the rats run, climb, jump and even cross brightly lit open spaces, contrary to their instincts. The rodents carry a backpack containing a radio receiver and a power source that transmits the signals into their brains through electrical probes the breadth of a hair.
Learning for pleasure
Talwar’s team train the wired-up rats to turn left or right in a maze according to the artificial whisker stimuli. A jolt to the MFB rewards the rats for correct behaviour. After a week’s training the rats turn on cue without reward.
Thereafter frequent pleasure pulses motivate trained rats to navigate through virtually any environment. Extra pulses spur them on to challenges like climbing or jumping.
There is a limit to what the animals can be made to do: instinct tempers their eagerness for reward. For example, even continuous MFB stimulation cannot make a rat jump from a dangerous height.
Manipulating animal’s minds, especially for dangerous missions, raises ethical questions. "Debate is certainly needed," admits Talwar. But he points out that the rats live as long as normal, and when not wearing mind-altering backpacks they are just like any other rats. "They’re not zombies, they work with their instincts," he says.
In a way, ratbots are an extension of classical behavioural experiments in which animals learn to perform tasks in return for food, say. It’s just that the reward for leaning, as far as a ratbot is concerned, comes from within. This virtual learning could make ratbots a new model for studying animal behaviour.
TOM CLARKE | © Nature News Service
Methane vanishing on Mars: Danish researchers propose new mechanism as an explanation
08.07.2019 | Aarhus University
Modelling leads to the optimum size for platinum fuel cell catalysts: Activity of fuel cell catalysts doubled
03.07.2019 | Technische Universität München
Adjusting the thermal conductivity of materials is one of the challenges nanoscience is currently facing. Together with colleagues from the Netherlands and Spain, researchers from the University of Basel have shown that the atomic vibrations that determine heat generation in nanowires can be controlled through the arrangement of atoms alone. The scientists will publish the results shortly in the journal Nano Letters.
In the electronics and computer industry, components are becoming ever smaller and more powerful. However, there are problems with the heat generation. It is...
Scientists have visualised the electronic structure in a microelectronic device for the first time, opening up opportunities for finely-tuned high performance electronic devices.
Physicists from the University of Warwick and the University of Washington have developed a technique to measure the energy and momentum of electrons in...
Scientists at the University Würzburg and University Hospital of Würzburg found that megakaryocytes act as “bouncers” and thus modulate bone marrow niche properties and cell migration dynamics. The study was published in July in the Journal “Haematologica”.
Hematopoiesis is the process of forming blood cells, which occurs predominantly in the bone marrow. The bone marrow produces all types of blood cells: red...
For some phenomena in quantum many-body physics several competing theories exist. But which of them describes a quantum phenomenon best? A team of researchers from the Technical University of Munich (TUM) and Harvard University in the United States has now successfully deployed artificial neural networks for image analysis of quantum systems.
Is that a dog or a cat? Such a classification is a prime example of machine learning: artificial neural networks can be trained to analyze images by looking...
An international research group led by scientists from the University of Bayreuth has produced a previously unknown material: Rhenium nitride pernitride. Thanks to combining properties that were previously considered incompatible, it looks set to become highly attractive for technological applications. Indeed, it is a super-hard metallic conductor that can withstand extremely high pressures like a diamond. A process now developed in Bayreuth opens up the possibility of producing rhenium nitride pernitride and other technologically interesting materials in sufficiently large quantity for their properties characterisation. The new findings are presented in "Nature Communications".
The possibility of finding a compound that was metallically conductive, super-hard, and ultra-incompressible was long considered unlikely in science. It was...
24.06.2019 | Event News
29.04.2019 | Event News
17.04.2019 | Event News
22.07.2019 | Physics and Astronomy
22.07.2019 | Life Sciences
22.07.2019 | Earth Sciences