The universe is precisely 13.8 billion year old – or so our best scientific methods tell us. But how do you learn the age of the universe when there’s no trace left of its beginnings?
Can humanity survive on one of the seven earth-like Trappist-1 planets? And be sure to check out Physics Girl’s Trappist episode right here https://youtu.be/lK2iJe7AM_Q You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space […]
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