by Mitch Battros - ECM/ECTV

The finds caused a sensation when they were announced to the world in 2004.

But some researchers argued the bones belonged to a modern human with a combination of small stature and a brain disorder called microcephaly.

Why Do Good? Brain Study Offers Clues
01.22.07, 12:00 AM ET MONDAY, Jan. 22 (HealthDay News) -- People may not perform selfless acts just for an emotional reward, a new brain study suggests.

Instead, they may do good because they're acutely tuned into the needs and actions of others.

Scientists say a piece of the brain linked to perceiving others' intentions shows more activity in unselfish vs. selfish types.
"Perhaps altruism did not grow out of a warm-glow feeling of doing good for others, but out of the simple recognition that that thing over there is a person that has intentions and goals. And therefore, I might want to treat them like I might want them to treat myself," explained study author Scott Huettel, an associate professor of psychology at Duke University Medical Center, in Durham, N.C.