The public and news media should keep in mind that science is a system of organized skepticism. And it's that way for a good reason; skepticism keeps us from drawing unwarranted conclusions from what we observe.
The Drake Equation is a thought problem created in 1961 by Astronomer Frank Drake to produce a number meant to indicate how many intelligent and detectable civilizations may exist in the Milky Way galaxy which is our home in the Universe.
This article was originally posted on Inverse. In fact, on Thursday, SETI's Institute Director of Research Nathalie Cabrol
If hostile aliens were to blow our moon to bits or cause some serious damage to it, human would be in serious trouble -- even if we managed to successfully repel an extraterrestrial threat.
But scientists searching for ETs aren't waiting around.
Europa has a frozen crust and high radiation, but some scientists anticipate finding life there.
Many people -- from scientists to sci-fi writers -- have ruminated on the possibility that Earth was long ago discovered by another society. After all, the planet's been sitting around for more than four billion years. If anyone has ever visited our world, it's possible they left a calling card.
What would it take to hide an entire planet? It sounds more like a question posed in an episode of "Star Trek" than in academic discourse, but sometimes the bleeding edge of science blurs with themes found in science fiction.
It's as if someone in a galaxy far, far away rang a loud bell. Could it be a signal from aliens trying to get in touch? Or is it something hitherto unknown, but still completely natural?