In the Afterlife, the Selves write up reports on what they learned from their experiences. These are bound into books which are stored in an immense library spread across the cosmos.
The weight of the books distorts the gravitational pull of the galaxies, causing wobbles and discrepancies that have long confused scientists on Earth.
Few physicists suspect that the mysterious ’dark matter’ they seek, the missing material of the universe, is nothing more than the mass of mind-numbingly detailed memoirs building up over time.