Red dwarfs are by far the universe's most common stars, but it really doesn't seem like they're made for supporting life. The latest simulations suggest that the tidal forces of these stars' gravity would wipe out any chance of life.
A few months back, we learned about how axial tilt - or the lack thereof - could cause climates to spiral out of control in planets around red dwarfs. Now we can add another big problem for any potential life-supporting planets around red dwarfs. Because these stars are so much smaller and give off so much less heat than our Sun, the habitable zone has to be much closer in. This means any potential Earths around a red dwarf experience much fiercer gravitational forces, despite their stars' diminutive size.