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TagCaleb A. Scharf

Oumuamua is a mildly active comet, and the first interstellar object detected passing through the Solar System.

Astrobiologist Cautions Against Jumping the Gun in Spotting ET

Scientists he says, are cautious with good reason. There are many weird natural phenomena like Oumuamua out there.

At Nautilus, astrophysicist (and astrobiologist) Caleb A. Scharf offers some sobering reflections on the diligent search for extraterrestrial intelligences (ET) in recent decades: Despite this effort, there has been no evidence to date of extraterrestrial life. But that lack of evidence is not because the scientific enterprise is uniformly conservative, rigid, and close-minded, as implied by [astronomer Avi] Loeb and uncritically echoed by some columnists. It’s because no discovery or event has risen to the level where it is inexplicable in any other way. Could greater funding and support change that story? Perhaps, but the same could be said for almost any other ambitious scientific enterprise, and the answer cannot be known beforehand. Caleb Scharf, “The Alien-Haunted World” at Nautilus…

A Group Of Large Radio Telescopes

Astrophysicist Warns: Aliens May Be Boring or Unreachable

Researchers are taking the emissions from the vicinity of exoplanet Proxima B seriously. But if it is truly a technological signal, what would follow?

Boring? How very un-Star Trek of them! But it’s possible, says Caleb A. Scharf, director of astrobiology at Columbia University (pictured). He worries that, “Perhaps other life in the universe is, in the end, utterly dull.” Why might he think so? He is reflecting on the recent report of what may be a technological signal at roughly 982.002 MHz, coinciding with the direction of Proxima Centauri. If it is, what might the aliens turn out to be like? There’ll be some initial oddities, some curiosities that aren’t quite the things we planned for. A dull carrier wave signal for instance. Over time more evidence will show up, until eventually it’s clear that there are lots of species out there, puttering…