Agriculture
Keeping Bugs Away from Food
Seeds of the Future
Flush-Free Fertilizer
Amphibians
Newts
Toads
Salamanders and Newts
Animals
Bee Disease
Fishy Sounds
Walktopus
Behavior
Meet your mysterious relative
The Other Side of the Zoo Fence
Wake Up, Sleepy Gene
Birds
Seagulls
Flamingos
Falcons
Chemistry and Materials
Getting the dirt on carbon
The hungry blob at the edge of the universe
Bandages that could bite back
Computers
The solar system's biggest junkyard
The science of disappearing
Galaxies on the go
Dinosaurs and Fossils
A Rainforest Trapped in Amber
Winged Insects May Go Way Back
Fossil Forests
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Snowflakes and Avalanches
A Dire Shortage of Water
Pollution at the ends of the Earth
Environment
Island Extinctions
Ready, unplug, drive
Whale Watch
Finding the Past
A Long Haul
Fakes in the museum
Of Lice and Old Clothes
Fish
Whale Sharks
Megamouth Sharks
Barracudas
Food and Nutrition
Yummy bugs
A Pepper Part that Burns Fat
Strong Bones for Life
GSAT English Rules
Whoever vs. Whomever
Adjectives and Adverbs
Problems with Prepositions
GSAT Exam Preparation Jamaica
GSAT stars reap scholarship glory
GSAT Practice Papers | GSAT Mathematics | Maths
Results of GSAT are in schools this week
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Exam Preparation
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
Math Naturals
Math is a real brain bender
A Sweet Advance in Candy Packing
Human Body
Gut Microbes and Weight
Cell Phones and Possible Health Hazards
Disease Detectives
Invertebrates
Insects
Dragonflies
Jellyfish
Mammals
Pitbulls
Moles
Aardvarks
Parents
What Not to Say to Emerging Readers
Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
Physics
Extra Strings for New Sounds
Speedy stars
The Particle Zoo
Plants
Pumping Up Poison Ivy
White fuzzy mold not as friendly as it looks
The algae invasion
Reptiles
Crocodilians
Geckos
Copperhead Snakes
Space and Astronomy
A Planet from the Early Universe
Sounds of Titan
A Whole Lot of Nothing
Technology and Engineering
Sugar Power for Cell Phones
Machine Copy
Spinach Power for Solar Cells
The Parts of Speech
What is a Noun
Adjectives and Adverbs
What is a Preposition?
Transportation
Where rivers run uphill
Reach for the Sky
Robots on a Rocky Road
Weather
The Best Defense Is a Good Snow Fence
Recipe for a Hurricane
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™