By Emily Harari Dr. Daniel Angerhausen is an astrophysicist and astrobiologist at ETH Zürich. Ask him what the oldest question of humankind is and he’ll immediately jump to life on other planets: Are we alone, or are other planets outside our solar system similarly habitable? But Angerhausen doubles back:  “That’s also a bit exaggerated. Maybe the oldest question is, ‘Can I eat this?’ But I really think [habitability] is one of the biggest scientific questions and also one that is […]