Stuff They Don't Want You to Know
Rediscovering Ancient Innovation
From Greek fire to Roman concrete modern humans are only now beginning to rediscover the secret technology of the ancient world.
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Stuff They Don't Want You to Know: The Battle of Los Angeles
In the early hours of February 25th, 1942, air raid sirens resounded across Los Angeles, California. The military fired roughly 1500 anti-aircraft machine gun rounds and artillery shells at some unknown object in the sky. So what really happened?