Deep Earth

Deep beneath Earth's ancient crust lies a discovery that could change humanity's understanding of life itself.

In Deep Earth, a geological expedition beneath the Canadian Shield uncovers an anomalous fragment embedded deep within some of the planet's oldest rock. Its elemental chemistry is unusual. Its mineralogy suggests a differentiated planetary origin. And laboratory evidence increasingly points toward Mars.

But the greater mystery lies inside.

Microscopic filament-like structures appear w...