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
New dental implant with built-in reservoir reduces risk of infections
18.01.2017 | KU Leuven
Many muons: Imaging the underground with help from the cosmos
19.12.2016 | DOE/Pacific Northwest National Laboratory
A Swedish-German team of researchers has cleared up a key process for the artificial production of silk. With the help of the intense X-rays from DESY's...
For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
24.01.2017 | Physics and Astronomy
24.01.2017 | Life Sciences
24.01.2017 | Health and Medicine