A new analysis is getting some attention, one claiming to have refined the old Drake equation and produced firmer numbers, leading to this conclusion: Under the strictest set of assumptions – where, as on Earth, life forms between 4.5bn and 5.5bn years after star formation – there are likely between four and 211 civilisations in … Continue reading 36 civilizations in the galaxy?
Tom Hartsfield has a post up at Real Clear Science criticizing both the Drake equation and SETI: If you like science fiction, you're probably familiar with the Drake equation. This famous one-line formula solves for the number of intelligent alien civilizations within our galaxy with whom we might be able to communicate. Supporters of the … Continue reading Three conditions are necessary for SETI to succeed
There's been a lot of news lately about the estimate of habitable planets in our galaxy. It sounds like there may be 40 billion planets in the habitable zones around their stars. This is cool stuff! The nearest one might be only 12 light years away. It's very tempting from this news, to conclude that … Continue reading Why extraterrestrial civilizations may be exceedingly rare