This is going to be one of the “how we know what we know” kind of shows. How do scientist determine the age of things? How do we know the age of everything from stone tools, to the age of the Earth, to the age of the very Universe.
You can watch us record Astronomy Cast live every Monday at 12:00 pm PDT (3:00 pm EDT, 2000 GMT). Make sure you circle Fraser on Google+ to see it show up in the feed. You can also see it live over on our YouTube channel.
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Astronomers have just found one of the youngest planets ever. At only 3 million years…
Mars formed 4.5 billion years ago, roughly the same time as the Earth. We know…
Dark matter made out of axions may have the power to make space-time ring like…
Most of the time the Sun is pretty well-mannered, but occasionally it's downright unruly. It…
One mystery in planetary science is a satisfying origin story for Mars's moons, Phobos and…
The largest magnetic fields in the universe may have found themselves charged up when the…