Have We Already Been Visited by Aliens?

[Ninshub]

This made CNN.

https://www.cnn.com/videos/tv/2021/01/30...n-life.cnn

[Laird]

Interstellar object, named Oumuamua, likely a cookie-shaped planet shard, study reveals

Using its shininess, size and shape — and that it was propelled by escaping substances that didn't produce a visible tail — Mr Jackson and Professor Desch devised computer models that helped them determine Oumuamua was most likely a chunk of nitrogen ice being gradually eroded, the way a bar of soap thins with use.

Their two papers were published Tuesday by the American Geophysical Union and also presented at the Lunar and Planetary Sciences Conference.

[...]

Not all scientists buy the new explanation.

Harvard University's Avi Loeb disputes the findings and stands by his premise that the object appears to be more artificial than natural — in other words, something from an alien civilization, perhaps a light sail.

Given that Oumuamua is unlike comets and asteroids — and something not seen before — "we cannot assume ‘business as usual,' as many scientists argue," Professor Loeb said.

Also, here's a cross-link to Ian's thread on the asteroid from early 2019 - just for referencing purposes: 'Oumuamua.