If the Universe Is Teeming with Aliens ... WHERE IS EVERYBODY?: Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life

by Stephen Webb

The evidence that extraterrestrials are currently visiting Earth is essentially nonexistent.

There are 50 billion billion billion cubic miles of space within a sphere that encloses the orbit of Pluto; and the Solar System extends to the Oort Cloud of comets, almost a light year from the Sun. The chances of finding a small alien artifact by accident are essentially zero.

Directed panspermia is the suggestion that an ancient ETC deliberately aimed spores toward planets with conditions favorable to the survival of life.

Particles with imaginary mass must always travel faster than the speed of light. Such imaginary-mass particles are called tachyons.

The age of neutrino astronomy is upon us.