The top box office hit this past weekend was Lucy, a sci-fi thriller starring Scarlett Johansson and Morgan Freeman about a woman who learns to use 100% of her brain. It's a cool concept with a ...

Although Lucy's skull was incomplete, enough of it remained to show that she had a small, apelike brain, and other skulls of her species found at the same site confirmed it. Some experts argue ...

Dated to 3.2 million years ago, Lucy was the oldest and most complete human ancestor ever found at the time of her discovery. Two features set humans apart from all other primates: big brains and ...