X-ray lasers: Why does brighter mean darker?

When we illuminate something, we usually expect that the brighter the source we use, the brighter the resulting image will be. This rule also works for ultra-short pulses of laser light—but only up to a certain intensity. ...

Q&A: Research with embryo models needs legal clarity

Science often runs ahead of legislation—and this is now also true for research on embryo-like cell aggregates from human stem cells. Bioethicist Alessandro Blasimme of ETH Zurich explains why this controversial topic calls ...

Promoting public transportation with modern pricing schemes

In Summer 2022, Germany introduced an unprecedented reduction in public transport fares, the so-called 9-Euro Ticket, which granted nationwide access to public transport for just 9 Euros per month—recently followed up by ...

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