Agriculture
Getting the dirt on carbon
Growing Healthier Tomato Plants
Earth-Friendly Fabrics
Amphibians
Salamanders and Newts
Newts
Frogs and Toads
Animals
Cacophony Acoustics
Return of the Lost Limbs
Monkeys Count
Behavior
Slumber by the numbers
Swedish Rhapsody
Memory by Hypnosis
Birds
Hummingbirds
Owls
Nightingales
Chemistry and Materials
The chemistry of sleeplessness
Butterfly Wings and Waterproof Coats
Gooey Secrets of Mussel Power
Computers
Toxic Dirt + Avian Flu = Science Fair Success
Electronic Paper Turns a Page
The hungry blob at the edge of the universe
Dinosaurs and Fossils
Middle school science adventures
Dino Bite Leaves a Tooth
Dino-bite!
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Arctic Algae Show Climate Change
Getting the dirt on carbon
Detecting an Eerie Sea Glow
Environment
When Fungi and Algae Marry
A Change in Time
The Oily Gulf
Finding the Past
Stone Tablet May Solve Maya Mystery
Traces of Ancient Campfires
Meet your mysterious relative
Fish
Skates
Skates and Rays
Tiger Sharks
Food and Nutrition
Building a Food Pyramid
The mercury in that tuna
Turning to Sweets, Fats to Calm the Brain
GSAT English Rules
Problems with Prepositions
Who vs. Whom
Who vs. That vs. Which
GSAT Exam Preparation Jamaica
Mastering The GSAT Exam
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Scholarship
GSAT Exams Jamaica Scholarships
Results of GSAT are in schools this week
Access denied - Disabled boy aces GSAT
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
Play for Science
Deep-space dancers
Math Naturals
Human Body
Football Scrapes and Nasty Infections
Gut Germs to the Rescue
Germ Zapper
Invertebrates
Clams
Jellyfish
Giant Clam
Mammals
Labradors
Manatees
Boxers
Parents
Raise a Lifelong Reader by Reading Aloud
What Not to Say to Emerging Readers
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
Hold on to your stars, ladies and gentlemen
The Particle Zoo
IceCube Science
Plants
Making the most of a meal
Flower family knows its roots
Getting the dirt on carbon
Reptiles
Copperhead Snakes
Reptiles
Black Mamba
Space and Astronomy
Witnessing a Rare Venus Eclipse
Tossing Out a Black Hole Life Preserver
An Earthlike Planet
Technology and Engineering
A Satellite of Your Own
Slip Sliming Away
Bionic Bacteria
The Parts of Speech
What is a Preposition?
Adjectives and Adverbs
Problems with Prepositions
Transportation
Revving Up Green Machines
Where rivers run uphill
Morphing a Wing to Save Fuel
Weather
A Change in Climate
Where rivers run uphill
Either Martians or Mars has gas
Add your Article

Salt and Early Civilization

Before salted fries came out of drive-through windows, before salty pretzels sat on the shelves of every grocery store, before there was a saltshaker on every dinner table, people had to go to a lot of trouble to get salt. Archaeologists have now uncovered the earliest strong evidence of salt production ever found. It suggests that large-scale salt making occurred at least 4,000 years ago in a settlement in central China. The new evidence comes out of the ruins at Zhongba, a settlement along the salty Ganjing River. Artifacts include pieces of vessels that were used to boil river water. Boiling salty water causes the water to evaporate, leaving behind cakes of salt. The oldest objects from Zhongba, dating back to between 2000 B.C. and 1750 B.C., include vats with pointy bottoms that were used to either store or boil salt water. From the period between 1630 B.C. and 1210 B.C., the researchers found lots of small cups with pointy bottoms. These were probably molds for making salt cones for trading. From the period between 1100 B.C. and 200 B.C., the archaeologists dug up small jars with round bottoms. People still use jars like this in some parts of the world to boil salt water and make salt cakes. Chemical analyses of the river water and of the soil in pits at Zhongba provide further evidence of salt making. Remains inside the round-bottomed jars seem to be calcium oxide, a chemical that forms during the salt-making process. There were also tiny traces of salt inside many of the vessels found at the site. Learning how to produce large amounts of salt helped the Chinese develop cities and build empires, the scientists say. Back when salt and salted foods were hard to come by, the crystal seasoning was worth a lot, and the Chinese traded it for other goods. Now that they have the technology to do it, archaeologists want to look for signs of salt making at even older sites in the Middle East. Even as nutritionists today warn that people are eating too much salt, the history of the seasoning has a lot to say about the development of cultures around the world.E. Sohn

Salt and Early Civilization
Salt and Early Civilization








Designed and Powered by HBJamaica.com™