Agriculture
Seeds of the Future
Hungry bug seeks hot meal
Middle school science adventures
Amphibians
Toads
Bullfrogs
Poison Dart Frogs
Animals
Fishing for Giant Squid
Dolphin Sponge Moms
Elephant Mimics
Behavior
Chimpanzee Hunting Tools
Homework blues
Girls are cool for school
Birds
Cardinals
Turkeys
Blue Jays
Chemistry and Materials
Atom Hauler
A New Basketball Gets Slick
Sticking Around with Gecko Tape
Computers
Batteries built by Viruses
Getting in Touch with Touch
The Shape of the Internet
Dinosaurs and Fossils
Teeny Skull Reveals Ancient Ancestor
Dino Flesh from Fossil Bone
Mini T. rex
E Learning Jamaica
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Explorer of the Extreme Deep
Slip Slidin' Away—Under the Sea
Meteorites may have sparked life on Earth
Environment
Blooming Jellies
Groundwater and the Water Cycle
Pumping Up Poison Ivy
Finding the Past
Childhood's Long History
The Puzzle of Ancient Mariners
Untangling Human Origins
Fish
Flounder
Catfish
Swordfish
Food and Nutrition
Moving Good Fats from Fish to Mice
Allergies: From Bee Stings to Peanuts
Eat Out, Eat Smart
GSAT English Rules
Order of Adjectives
Adjectives and Adverbs
Finding Subjects and Verbs
GSAT Exam Preparation Jamaica
GSAT Scholarship
The Annual GSAT Scholarships
How are students placed after passing the GSAT exam
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Practice Papers | GSAT Mathematics | Maths
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
10 Common Mistakes When Preparing for the GSAT Math Test
Play for Science
42,000 students will sit for the GSAT Exam in two weeks
Human Body
Germ Zapper
Surviving Olympic Heat
Cell Phone Tattlers
Invertebrates
Daddy Long Legs
Butterflies
Nautiluses
Mammals
African Wildedbeest
Prairie Dogs
Spectacled Bear
Parents
What Not to Say to Emerging Readers
Choosing a Preschool: What to Consider
How children learn
Physics
Einstein's Skateboard
Thinner Air, Less Splatter
Hold on to your stars, ladies and gentlemen
Plants
Tracking the Sun Improves Plant Pollen
Fastest Plant on Earth
Hungry bug seeks hot meal
Reptiles
Boa Constrictors
Crocodilians
Sea Turtles
Space and Astronomy
Mercury's magnetic twisters
Dark Galaxy
Older Stars, New Age for the Universe
Technology and Engineering
Beyond Bar Codes
Weaving with Light
Searching for Alien Life
The Parts of Speech
What is a Noun
Pronouns
Problems with Prepositions
Transportation
Robots on a Rocky Road
Tinkering With the Basic Bike
Middle school science adventures
Weather
Either Martians or Mars has gas
A Change in Climate
Antarctica warms, which threatens penguins
Add your Article

Prehistoric Trips to the Dentist

Going to the dentist has a much longer history than you might imagine. Researchers recently unearthed what may be the earliest examples of ancient dentistry yet discovered—holes drilled in teeth that are between 9,000 and 7,500 years old. The teeth come from a prehistoric farming village called Mehrgarh in what is now Pakistan. A total of 11 teeth from nine adults contained drilled holes, the researchers report. Cavities caused by tooth decay can be painful. If untreated, decaying teeth will eventually rot away or fall out. Dentists today use power drills with metal tips to scour out cavities and prevent decay from spreading. Mehrgarh dentists probably used tools made from flint. These ancient people already used sharpened flint attached to wooden rods to drill holes for making beads out of pieces of shell, turquoise, and other materials. It wouldn't have been hard for them to use the same skills to drill teeth. Drilled holes in the Mehrgarh teeth are between 1.3 and 3.2 millimeters wide and between 0.5 and 3.5 millimeters deep. The edges are smooth, which suggests that patients were alive when the holes were drilled and remained alive for a long time afterwards, because chewing continued to wear down their teeth. Researchers aren't yet sure whether some type of filling once plugged the holes. The holes were probably not made for decoration or display because the teeth in question sat far back in people's mouths. Four of the teeth had decay next to the holes. Scans with high-powered imaging equipment showed ridges within the holes that might have been made by a flint drill. Both observations support that the idea that the people of Mehrgarh were actually practicing dentistry and digging out cavities. To check their conclusions, the scientists made models of prehistoric stone tools and used them to drill human cheek teeth. (The teeth were not attached to people at the time.) Using this method, it only took a minute to make a hole that resembled the ones that Mehrgarh dentists made. Getting cavities drilled and filled is important, but it can be uncomfortable. Next time you're at the dentist, however, just be thankful that there's no sharp blade of flint in your mouth. That could be really unpleasant!—E. Sohn

Prehistoric Trips to the Dentist
Prehistoric Trips to the Dentist








Designed and Powered by HBJamaica.com™