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As wave specialists, seismologists map the structure of planets from the information that seismic waves carry. Now, the team led by ETH professor Andreas Fichtner is also using this knowledge for medical imaging. Both ultrasound for medical imaging and seismology for imaging the Earth's interior measure the propagation of waves through matter.

Researchers from ETH Zurich have established that the destruction of ozone over the Arctic in the spring causes abnormal weather throughout the northern hemisphere, with many places being warmer and drier than average - or too wet. Many people are familiar with the hole in the ozone layer over Antarctica, but what is less well known is that occasionally, the protective ozone in the stratosphere over the Arctic is destroyed as well, thinning the ozone layer there.

Liquid water is an important prerequisite for life to develop on a planet. As researchers from the University of Bern, the University of Zurich and the National Centre of Competence in Research (NCCR) PlanetS report in a new study, liquid water could also exist for billions of years on planets that are very different from Earth.

Using DNA data, researchers have examined seawater to find not only new species of bacteria, but also previously unknown natural products that may one day prove beneficial. The oceans are teeming with countless forms of life, from the world's largest creature - the blue whale - to miniscule microorganisms.

How the plates of the Earth's crust move depends largely on the behaviour of the rocks below them in the mantle. A new ETH study now shows that the grain size of these rocks is a key factor. The face of our planet is shaped by forces deep within its interior. These push the plates of the Earth's crust against each other, causing mountains and volcanoes to form along the collision zones.

Brown dwarfs, mysterious objects that straddle the line between stars and planets, are essential to our understanding of both stellar and planetary populations. However, only 40 brown dwarfs could be imaged around stars in almost three decades of searches. An international team led by researchers from the Open University and the University of Bern directly imaged a remarkable four new brown dwarfs thanks to a new innovative search method.

The InSight mission on Mars is running out of power and most of its functions could be shut down in the months to come. Some have already been deactivated. However, the attached seismometer, SEIS, will remain in operation for as long as possible. ETH Professor Domenico Giardini takes stock of three years of marsquake measurements.

The biologically active, slow-flow sand filters of lake water treatment would remove nanoplastics from the raw water very efficiently. This was shown both in the laboratory and in larger, realistic tests and modelling. It's a hot topic, at least on social media: tiny plastic particles allegedly end up not only in oceans and lakes, but also in drinking water - and, yes, even in bottled mineral water.

Engineers at EPFL and the University of Geneva believe they hold the key to automated drone mapping. By combining artificial intelligence with a new algorithm, their method promises to considerably reduce the time and resources needed to accurately scan complex landscapes. Three-dimensional (3D) mapping is a very useful tool, such as for monitoring construction sites, tracking the effects of climate change on ecosystems and verifying the safety of roads and bridges.

An interdisciplinary study, in which the University of Bern played a major role, sheds new light on two extreme volcanic events and a subsequent global cooling in antiquity. With the help of a highly precise analysis of volcanic ash and sulphur in ice cores from Greenland and Antarctica, it became clear that the global cooling around 1627 BC was not attributable to the Thera volcano in Santorini, as previously assumed, but to a volcano in distant Alaska.

Twenty million years ago, the Swiss Plateau region, or -Mittelland-, was an ocean in which dolphins swam.

Scientists reveal a surprising mechanism in the formation of copper deposits, an essential metal for the energy transition. Copper is one of the most widely used metals on the planet today due to its electrical and thermal conduction properties. The greatest natural resources of this metal are the so-called "porphyry" deposits that come from magmas deep in the Earth.

Oliver Schilling is newly appointed Professor of Hydrogeology at the University of Basel, where he is setting up a research group that is also associated with the Eawag Water Resources and Drinking Water Department in Dübendorf. This dual affiliation is perfect, says Schilling. Oliver Schilling spends most of his working time at the University of Basel, where he has been gathering his research group around him as a new assistant professor of hydrogeology since the beginning of March.

Can iron-rich dust fertilize the ocean, stimulate algae growth there, and thereby capture carbon dioxide from the atmosphere? An international research team involving the University of Bern and led by the University of Bonn used deep-sea sediment cores from the Scotia Sea to investigate whether this hypothetical greenhouse gas sink had an effect during ice ages.

Naturally, water levels of rivers and streams are variable and fluctuate between drier and wetter periods. Spring snowmelt and the timing and location of rainfall events often drive these fluctuations, especially in alpine areas. Sediment and adsorbed nutrients are mobilised by flowing water and transported through river valleys.

Groundwater serves as drinking water for around half of the world's population and provides water for over 40 percent of the world's agriculture. So, there is no question that groundwater research plays an important role at Eawag. The aquatic research institute deals with groundwater quality, the regeneration of groundwater, geochemical processes in the subsurface and the treatment of groundwater to produce drinking water , both nationally and internationally.

An international team of scientists conducted CALISHTO, a large-scale air measurement campaign in Greece last fall, with the goal of surveying, counting and characterizing the tiny particles and their impact on cloud formation. The goal is to incorporate this information in climate models for improved predictions of clouds, precipitation and climate.

A team led by the University of Bern was able to proof that the glaciers of the penultimate ice age ('Riss' glaciation) mainly eroded the bedrock between Thun and Bern, but that during the last glaciation (' Würm'- glaciation) glacial carving resulted in a widening and not in a further deepening of the valleys.

An international team including researchers from the University of Bern and the University of Geneva as well as the National Centre of Competence in Research (NCCR) PlanetS analyzed the atmosphere of one of the most extreme known planets in great detail. The results from this hot, Jupiter-like planet that was first characterized with the help of the CHEOPS space telescope, may help astronomers understand the complexities of many other exoplanets - including Earth-like planets.

In a large-scale fundraising campaign, popular YouTubers like Mister Beast and Mark Rober are currently trying to rid the oceans of almost 14,000 tonnes of plastic waste. That's about 0.15 per cent of the amount that ends up in the oceans every year. But it's not just our waters that are full of plastic.