Thread by @thisisinsider

There are now three monoliths of unknown origin around the world, with the third appearing in California on Wednesday. @thisisinsider has been keeping tabs on each structure, and explored the (small) possibility of alien involvement. 👀

The metal monolith recently documented in the Utah desert on November 18 vanished after sparking comparisons to "2001: A Space Odyssey." insider.com/strange-metal-…

A Utah state helicopter crew was counting sheep when it discovered the mysterious metal monolith in a red-rock desert area. Google Earth maps showed the structure appeared sometime between August 2015 and October 2016. insider.com/utah-helicopte…

A second monolith was discovered in Romania, on the same day the Utah monolith vanished. insider.com/second-monolit…

On Wednesday, the third metal monolith appeared in California, almost exactly matching the previously found monoliths. insider.com/third-monolith…

The mysterious appearances of the monoliths immediately drew theories of extra-terrestrial origins... so why haven't we found aliens yet?

If we were able to find aliens, could we even communicate with them? A computer scientist weighs in.

Scientists have acknowledged that alien life likely exists, or has existed in the past.

In a new study, two astronomers have identified 1,004 sun-like stars that could all have habitable Earth-like planets in their orbits. businessinsider.com/aliens-on-near…

And a @NASA scientist discovered that Jupiter's oceanic moon Europa (a prime candidate for alien life) might glow in the dark. businessinsider.com/nasa-jupiter-o…

Follow @thisisinsider for all you need to know about the monoliths AND space activity. 👽insider.com/monolith-timel…

🚨 Monolith alert 🚨 Walkers came across another metal pillar in Dutch nature reserve.

insider.com/the-netherland…

🚨 A fifth monolith was spotted on Compton Beach, on the UK's Isle of Wight, Sunday morning.