trappist-1 system

Are there many planets with life?
We know that one in five stars has an Earth-like planet. There are 200 billion stars in our galaxy alone.
New discovery: 7 Earth-like planets that could be habitable
The seven planets in the TRAPPIST-1 system all share some Earth-like characteristics that could be favorable for supporting life.
US detects radio signals from 7 planets similar to Earth
A new technique for detecting alien radio signals has been applied to the TRAPPIST-1 system.