194 Quotes by Seth Shostak

The majority of my UFO diet consists of reports describing suspected encounters. This is not surprising, as there are thousands of sightings annually. The emailer has seen something unusual in the sky that he interprets as probable evidence of alien presence.

We're hard-wired by 200,000 years of evolution to be sensitive to the idea that someone might be watching us. They might be predators, after all. An uneasy feeling is perfectly natural if you suspect that someone has you in their ocular sights, whether it's a ghost or just some guy at the bus stop.

Clearly, enriching the cosmos with heavy elements takes a while. So there's inevitably an interval between the sterile aftermath of the Big Bang and a time when the cosmic chemistry set had enough ingredients to make rocky planets (and squishy biology).

No heating system can deliver perfectly uniform temperatures throughout a house, and drafts can magnify the perceived difference in temperatures. Try walking around with a thermometer.

Estimates are that at least 70 per cent of all stars are accompanied by planets, and since the latter can occur in systems rather than as individuals (think of our own solar system), the number of planets in the Milky Way galaxy is of order one trillion.

Despite the impression you may have from watching too much TV, movies are not about reproducing reality. Theyre about telling stories.

If aliens are really hanging out in our 'hood, it's hard to imagine any other fact more worthy of study. If not, then why does such a large fraction of the populace insist on believing they're here?

If this is the only planet on which not only life, but intelligent life, has arisen, that would be very unusual.

Recent results from astronomers who study the occasional gravitational lensing of unknown worlds by intervening stars suggest that orphan planets could be at least as numerous as the stars. In other words, there could be hundreds of billions of orphan worlds shuffling through our galaxy.