What If Earth Has an Identical Twin?

VOICE OVER: Noah Baum WRITTEN BY: Alex Slade

For scientists and astronomers scanning the skies for signs of alien life, it's the holy grail of all discoveries - a duplicate Earth. A planet capable of harbouring life, evolution and a potential destination for the future of humankind. But how would such a discovery change our own lives? What would happen if Earth had an identical twin? read more...