Gesamtlänge aller Episoden: 21 days 6 hours 19 minutes
How radio telescopes show us unseen galaxies | Natasha Hurley-Walker
We should all be feminists | Chimamanda Ngozi Adichie
A simple birth kit for mothers in the developing world | Zubaida Bai
An intergalactic guide to using a defibrillator | Todd Scott
3 ways to plan for the (very) long term | Ari Wallach