Thursday April 13, 2017
Scratches show earliest evidence of right-handedness
more stories from this episode
- Bad Vibes: How shaking buildings could be making you sick
- Pulling water from desert air, just like Star Wars predicted
- A new approach to Canadian science funding?
- Are there really 7,000 Siberian methane bubbles ready to explode?
- Scratches show earliest evidence of right-handedness
- Quirks & Questions: How can I guarantee I'll become a fossil after I die?
- Full Episode
About 90 percent of us are right-handed. But the dominance of right-handedness in the population is a very human trait in that it separates us from our ape relatives. Their populations show no dominance of one hand over the other.
So scientists have wondered how far back this dominance of right-handedness goes, and what it tells us about our evolutionary lineage.
A new study might shed light on this mystery. Dr. David Frayer, a professor emeritus in anthropology from The University of Kansas has found the earliest fossil evidence for right-handedness. The clue came from a very early hand-to-mouth existence.