If you think back to the 1997 film Contact, you’ll recall a scene where Jodie Foster, playing alien-hunting astronomer Ellie Arroway, lies on her car hood with huge headphones on her ears, in a field of towering white satellite dishes. She’s waiting for something. A signal. She lies still, her eyes closed. And suddenly, she hears something, the sounds of something – someone – beyond the earth, communicating with her.