How do massive young star clusters form?

Young massive star clusters are systems of stars with more than about ten thousand solar-masses of material and ages less than about one hundred million years that are gravitationally bound together. In these clusters the ...

NASA celebrates 25 years of breakthrough gamma-ray science

Twenty-five years ago this week, NASA launched the Compton Gamma Ray Observatory, an astronomical satellite that transformed our knowledge of the high-energy sky. Over its nine-year lifetime, Compton produced the first-ever ...

Everything you eat is made of chemicals

We are routinely warned by earnest websites, advertisments and well-meaning popular articles about nasty "chemicals" lurking in our homes and kitchens. Many tout the benefits of switching to a "chemical-free lifestyle".

Restoring ecosystems – how to learn from our mistakes

In a joint North European and North American study led by Swedish researcher Christer Nilsson, a warning is issued of underdocumented results of ecological restorations. The researchers show that continuous and systematic ...

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