Agriculture
Making the most of a meal
Microbes at the Gas Pump
Watering the Air
Amphibians
Newts
Toads
Salamanders
Animals
A Meal Plan for Birds
Polar Bears in Trouble
Stunts for High-Diving Ants
Behavior
The Snappy Lingo of Instant Messages
Mosquito duets
Video Game Violence
Birds
Hawks
Kookaburras
Parrots
Chemistry and Materials
Salt secrets
Revving Up Green Machines
The hottest soup in New York
Computers
Seen on the Science Fair Scene
Galaxies on the go
It's a Small E-mail World After All
Dinosaurs and Fossils
Message in a dinosaur's teeth
An Ancient Feathered Biplane
Dinosaur Dig
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
Earth
Coral Islands Survive a Tsunami
Pollution at the ends of the Earth
Farms sprout in cities
Environment
Food Web Woes
Shrinking Fish
Whale Watch
Finding the Past
Meet your mysterious relative
An Ancient Childhood
Words of the Distant Past
Fish
Cleaning Up Fish Farms
Tiger Sharks
Angler Fish
Food and Nutrition
A Taste for Cheese
Turning to Sweets, Fats to Calm the Brain
Chew for Health
GSAT English Rules
Subject and Verb Agreement
Capitalization Rules
Whoever vs. Whomever
GSAT Exam Preparation Jamaica
Tarrant High overcoming the odds
Mastering The GSAT Exam
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
Results of GSAT are in schools this week
GSAT stars reap scholarship glory
GSAT Mathematics
A Sweet Advance in Candy Packing
Math of the World
Math and our number sense: PassGSAT.com
Human Body
Germ Zapper
Spit Power
Spitting Up Blobs to Get Around
Invertebrates
Camel Spiders
Sea Urchin
Lobsters
Mammals
Grizzly Bear
Deers
Weasels
Parents
Children and Media
The Surprising Meaning and Benefits of Nursery Rhymes
How children learn
Physics
Powering Ball Lightning
Spin, Splat, and Scramble
Black Hole Journey
Plants
Bright Blooms That Glow
Tracking the Sun Improves Plant Pollen
Seeds of the Future
Reptiles
Snakes
Cobras
Garter Snakes
Space and Astronomy
Icy Red Planet
Asteroid Lost and Found
Baby Star
Technology and Engineering
Sugar Power for Cell Phones
Searching for Alien Life
Algae Motors
The Parts of Speech
What is a Verb?
Problems with Prepositions
Pronouns
Transportation
Middle school science adventures
Revving Up Green Machines
Reach for the Sky
Weather
The solar system's biggest junkyard
Recipe for a Hurricane
Where rivers run uphill
Add your Article

Ancient Art on the Rocks

Whenever you sketch pictures in the dirt or draw stick figures on a chalkboard, you join a long line of artists from throughout human history. For thousands of years, people have been leaving their marks on rock walls and in caves around the world. New analyses of ancient paintings in the caves of Borneo suggest that people made matchstick figures and images of hands at least 10,000 years ago. This means that people probably lived on the Asian island as many as 5,000 years earlier than archaeologists had previously thought. It can be difficult to determine how old rock art is. One common way is to look at the amount of carbon in paint pigments. Carbon compounds break down at a predictable rate over time, giving scientists a clue about how long the paint has been there. Unfortunately, the paint used in the Gua Saleh Cave in southeast Borneo was made out of a type of iron compound, with no carbon. Instead of looking at the pigment itself, the team of French archaeologists who analyzed the paintings looked at carbon in calcite deposits on top of the art. Calcite is the main ingredient of limestone and of cave formations such as stalagmites and stalactites. Analyses showed that the calcite covering is about 9,900 years old. The researchers still don't know how long the paintings had been there before that. Ancient rock art can tell archaeologists a lot of interesting things about a culture, besides indicating how long people have lived in an area. The paintings at Gua Saleh might have been part of healing ceremonies or other rituals. Some day, people might be analyzing the sketches you leave behind, too. So choose your messages carefully. Who knows what the archaeologists of the future will think of the times we live in?E. Sohn

Ancient Art on the Rocks
Ancient Art on the Rocks








Designed and Powered by HBJamaica.com™