Why Ships Float

Massive cruise liners, cargo ships, and oil tankers may weigh hundreds of thousands of tons, yet they sail freely on the sea. In contrast, a stone far smaller in size and weight sinks to the seabed.





Is a vaccine injecting a virus

Does vaccination mean injecting the virus into yourself? After all, it doesn’t necessarily cause illness. Even if someone becomes infected and later recovers, wouldn’t they also develop antibodies?


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