Cosmic Dragons: Life and Death on Our Planet

"This groundbreaking volume explores evidence indicating that life on Earth began with the arrival of comets four billion years ago. It also theorizes that life on Earth is not unique, as the general scientific community tends to believe, and postulates that all living matter derives from the cosmic matter that make up comets that were formed in the early days of our galaxy. Also discussed are the numerous ways comets could bring an end to life, such as by introducing bacteria and viruses that cause epidemics, or by creating a new ice age from comet dust shrouding the planet from the sun."