The future of our planet may depend on how we answer these questions. It can be ... 1 Ernst Mach, the 19th century Austrian physicist and philosopher whose views influenced Albert Einstein, expressed the same ... Ryk C The concept of mind. ... 3. Sagan C. The dragons of Eden. New York: Random House, 1977. j 4. Popper KR, Eccles JC. The self and its brain ... Heiscnberg W. Physics and beyond. ... Pilkington R. Review of Examining holistic medicii (Stalker D, Glymour , eds.