From aliens or ghosts to the djinn, electric-voice phenomenon and UFO abductions, this book is the most comprehensive and enlightening survey ever made of encou

An unforgettable exploration of the natural world and the concept of biodiversity—what it is, why it matters, and how we as individuals can work to preserve i

Our eyes are the result of an evolutionary adaptation to the sun's light. Since the sun is a G dwarf and emits most of its light in only a small part of the ele

For over ten years, the dark side of the universe has been headline news. Detailed studies of the rotation of spiral galaxies, and 'mirages' created by clusters