K2-18b, an exoplanet 120 light-years away, may be the best hope to confirm that life exists beyond Earth. Here's what to know ...

The discovery was made on a massive exoplanet known as K2-18b that for years has captivated scientists searching for life ...

The red dwarf, located some 55 light-years away ... predict will be the last stars alight in an eventually cold and dark cosmos; these orbs will likely burn for more than 100 billion years.

Over the past decade, scientists have detected a puzzling phenomenon: radio pulses coming from within our Milky Way galaxy that would pulse every two hours, like a cosmic heartbeat.