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Proving that one quantum measurement is more powerful than another has long been difficult. Physicists from Heinrich Heine University Düsseldorf, Lund University and the University of Innsbruck have now developed and demonstrated a simple technique to certify that a certain class

Our universe is known to be remarkably homogeneous and isotropic. This essentially means that matter is distributed evenly throughout the universe and that it looks almost the same in all directions.

When we talk about climate adaptation, conservation or sustainability, we often assume that resilience is something everyone wants. The logic seems straightforward: Stronger resilience means better protection from floods, droughts, heat waves and ecological disruption. But what h

Cutting back on our use of energy and materials so that we live within Earth’s means can seem like an insurmountable challenge. But after a decade grappling with these problems, a historic Portuguese city is beginning to walk this tightrope