Isaac Arthur on MSN

The oldest alien civilizations may be the ones that never settled

We tend to imagine advanced civilizations as empires rooted to worlds, borders, and megastructures. But this episode explores ...
来自MSN

Aliens could be sending signals, but space weather might be hiding them

For over six decades, the Search for Extraterrestrial Intelligence (SETI) has been tirelessly scanning the cosmos for signs of alien life. Despite its extensive efforts, the universe remains eerily ...