It's a complex issue:
https://en.wikipedia.org/wiki/Habitability_of_red_dwarf_syst...
It's interesting to think about the old maps with "here be dragons" around the edge... on tide-locked worlds such maps could effectively be true.
https://en.wikipedia.org/wiki/Habitability_of_red_dwarf_syst...
It's interesting to think about the old maps with "here be dragons" around the edge... on tide-locked worlds such maps could effectively be true.
"I mean, it would be so unstable! Even with a thick atmosphere, temperatures at one point would fluctuate by tens of degrees, hundreds of times a year! Plants would be unable to photosynthesise for half the time! Animals would be blinded!"