Planetary scientist Joel Levine shows some intriguing -- and puzzling -- new discoveries about Mars: craters full of ice, traces of ancient oceans, and compelling hints at the presence, sometime in the past, of life. He makes the case for going back to Mars to find out more.

It’s 2019 and women are confidently owning their space in an impressive number of traditionally male-dominated fields, including the guitar industry. The number of female guitarists is growing rapidly and they are breaking barriers and shifting the culture around this instrument. In this TEDx Talk, Julia Levin showcases how women are raising the...