On: China begins operating world’s largest radio teles...

[ryanmarsh]

Everyone remembers what Arecibo was originally built for right?

[TeMPOraL → ryanmarsh]

I don't, and for those who like me didn't know:

https://en.wikipedia.org/wiki/Arecibo_Observatory#Design_and...

Apparently it was initially meant to help identify re-entering warheads so that they could be shot down before hitting their targets.

[ryanmarsh → TeMPOraL]

Or pick up radio signals from Russia when they bounced off the moon... https://steveblank.com/secret-history/