Space Junk

Space junk is a potential threat to human space exploration. In the frictionless vacuum of space, even a small particulate left behind by a past voyage can become deadly, fracturing seals and damaging the integrity of any spacecraft as it travels at extremely high speeds. So far, we’ve been relatively lucky—the sheer size of spaceContinue reading “Space Junk”

How do we know the age of Earth?

How do we know how old the Earth is? The age of the Earth was a relatively contested figure for a while, with early scientists struggling to date it with any level of precision. The first and most-well known way to set a lower bound on the age of the earth is through radioactive dating.Continue reading “How do we know the age of Earth?”

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