Phillyhenge

Move over Stonehenge – Philadelphia will feature its own version on Friday, April 6 at 7:30 p.m., when the sunset will align with M ...

Air Date: April 2, 2018

Listen 05:39

How Big is Big?

An acceptable range for the estimated number of galaxies in the universe is between 100 and 200 billion, according to astronomer Mario Li ...

Air Date: March 26, 2018

Listen 07:19