Radio broadcasts or even signals from your own mobile could be helping aliens detect life on Earth.
Research suggests aliens on nearby stars could detect Earth through radio signals leaked from the planet.
It's long been known that humans have been unintentionally sending radio waves deep into space.
Experts think if there are intelligent aliens on nearby stars with advanced technology, they could detect activity here through leaked radio signals and other transmissions from day-to-day life.
Scientists say thousands of satellites and millions of ground-based transmitters are making our planet more visible than ever before.
Researchers at the University of Manchester and the University of Mauritius used crowd-sourced data to simulate radio leakage from mobile towers to determine what alien civilisations might detect from various nearby stars, including Barnard's star, six light years away from Earth.
