Moonseed is a 1998 science fiction novel by British author Stephen Baxter, and the final book in the NASA Trilogy.

Stephen Baxter combines a host of disciplines (space travel, geology and disaster theory) to tell a tale where the rocks are literally swept from under the feet of humanity.

When Moon-dust containing the moonseed is dropped onto the streets of Edinburgh by a lab assistant of the main character, Earth's fate is sealed.

The moonseed begins to disintegrate the planet from the inside-out as the core heats up exponentially, while on the surface, nuclear power stations catastrophically fail, earthquakes and volcanic eruptions are abundant, and billions of people die as cities and continents vanish.

This novel also presents numerous theories and ideas about the space-faring future of humanity, albeit in an alternate dimension where we are forced into space by an eroding Earth.