This Puerto Rican Telescope Was Built in a Massive Sinkhole
0
0
4,097 विचारों·
10/23/23
में
Discovery
In 1958, the Pentagon wanted to build a 1,000-foot-long telescope for its ballistic missile program. They ended up building it inside a massive Puerto Rican sinkhole. From: AERIAL AMERICA:...
और दिखाओ
0 टिप्पणियाँ
sort इसके अनुसार क्रमबद्ध करें
