New research suggests that alien radio signals may be transformed by plasma from their home stars — and scientists on Earth ...

Alien life may one day be found not from radio signals beamed across the cosmos but from an all-too-familiar side-effect of civilisation: pollution. It's the Earth's atmosphere that he's usually ...

ET, are you there? The Green Bank Telescope is one of many radio telescopes being used by SETI to detect alien radio signals Jarek Tuszynski / Wikimedia Commons Alien civilisations are either ...

Are we alone in the universe? It’s a question that fascinates scientists and the public alike. In science, the focus tends to be on our search for life elsewhere. The idea that we might be watched by ...

Airport radar systems used daily at major hubs including London Heathrow and New York's JFK could be unintentionally ...

On Earth, the industrial age has led to a surge in nitrogen dioxide (NO2) - a major air pollutant which is ploughed into the atmosphere during the burning of fossil fuels. If another civilisation on a ...