Newsletter March 2025
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ETH Domain News
March 20, 2025
 
 
Christa McArdell and Urs von Gunten deal with micropollutants in wastewater (Photo: Kellenberger Photographie)
Using decades of experience to help the environment
Small quantities, big effect: micropollut­ants in wastewater are increasingly recog­nised as environmental problems. Eawag researchers played a key role in developing a globally pioneering strategy to ensure wastewater treatment plants are fit to deal with these residues as well.

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The eye of the sleeping subject was kept open with a special fixation device to record the pupil movements for several hours. (Image: Neural Control of Movement Lab / ETH Zurich)
The pupil as a window to the sleeping brain
For the first time, researchers at ETH Zurich have been able to observe how the pupils react during sleep. A look under the eyelids showed them that more happens in the brain during sleep than was previously assumed.

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Complexity on a small scale: A 3D-printed soft actuator or “artificial muscle”. Image: Empa
Muscles from the 3D-printer
Empa researchers are working on artificial muscles that can keep up with the real thing. They have now developed a method of producing the soft and elastic, yet powerful structures using 3D printing.

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Jonas Kallestrup, Masamitsu Aiba, and Felix Armborst (from left) in the PSI control room. They are part of the commissioning team that has now brought electrons back into the electron storage ring of the synchrotron as part of the SLS 2.0 upgrade project. © Paul Scherrer Institute PSI/Markus Fischer
SLS 2.0: How to start up a particle accelerator
The upgrade of the Swiss Light Source SLS, one of the large research facilities of the Paul Scherrer Institute PSI, is moving ahead: the electrons are back now in the completely new electron storage ring. A report from the SLS control room.

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© 2025 EPFL
Unraveling the brain's hidden motor modules
EPFL scientists have identified previously unknown neural modules in the brain that control movement and adapt during skill learning. Their findings challenge long-held ideas about how the brain organizes movement.

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The little alpine bell comes as soon as the snow is gone. (Photo: Veronika Stöckli)
Snow and blueberry pie are connected
Snow-free slopes at 1,900 m.a.s.l.: SLF biologist Christian Rixen explains the consequences for plants and why late frost becomes a risk.

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