Our Sun’s Undiscovered Stellar Nemesis Is Still Out There, Says Physicist
The decades old idea that our solar system’s Oort Cloud is continually perturbed by a heretofore undetected low mass Red Dwarf star remains the best explanation for periodicities found in Earth’s impact record. Or so says a well known physicist who has long championed this idea.
We haven't written up this one. Universe Today has the full story — the link below goes straight to it.