Dental routine of early man revealed

Scientists recently found new evidence that ancient Chinese, living 300,000 to 400,000 years ago, would pick their teeth.

It may be the earliest evidence of tooth-picking among humans in eastern Asia.

Scientists from China, Spain and the United States used binocular microscopes and scanning electron microscopes to examine the surfaces of seven fossilized human teeth unearthed in Yiyuan county in Shandong province, on which they found marks left by tooth-picking.