Listen in to learn about how a knee jerk reaction, eels, and the knife fish all use electrical impulses.
One might object that if our immune system were intelligently designed, it would be utterly immune to all pathogens.
The arrival of humans on the scene of life is impossible to explain through unguided evolution alone, says Dr. Geoffrey Simmons.
Will robots ever experience empathy or other feelings, or develop a genuine sense of humor?
Dr. Simmons sees clues of design in the processes of reproduction, in development, and in the many complex events in the lungs and vascular system that make childbirth possible.