Late Bronze Age timeline: 2000 – 1000 BC
Earliest known spoked wheels, from a grave in western Siberia When about 2000 BC the Central Asians invented better wheels with spokes, so you could fight from your chariot, a new [...]
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09, 2017
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09, 2017
Science in Central America and South America
A rubber ball made by the Olmec people (about 1000 BC) Invention of rubber With different natural resources available to them, the people of South America and Central America invented different things than [...]
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09, 2017
Where does chewing gum come from? Central America
Sapodilla tree - where chewing gum comes from Who invented chewing gum? Nobody knows when the first person began to chew gobs of sap from trees, but it was probably [...]
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09, 2017
What is rubber? History of rubber
A big rubber tree in Mexico Olmec people, living in southern Mexico, invented rubber about 1600 BC. It was just as they were beginning to build their empire. Rubber starts out as [...]
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08, 2017
What is electricity? Physics
What is electricity? A bolt of lightning in the sky What is electricity made of? Everything in the universe is made of atoms. Those atoms are made of electricity. Atoms are [...]
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08, 2017
History of Bicycles – Steel and feminism
A velocipede Early wooden bicycles Bicycles were invented bit by bit in many different countries. They grew out of earlier inventions like wheels (from Central Asia) and wheelbarrows and cranks (from China), but Karl [...]
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06, 2017
South/Central America Scavenger Hunt
Tomato How many things can you find around your house that people had in South or Central America before 1500 (before the European invasion)? If you don't find many around [...]
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06, 2017
Medieval and modern knitting history
Modern knitting history: Stocking frame knitting machine (1750) Knitting silk stockings In the 1500s AD, knitters in Spain and France started to produce very fine knitted silk stockings, with little tiny [...]
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06, 2017
What are hydrocarbons? Simple chemistry
A model of a methane molecule - the simplest of hydrocarbons A kind of molecule Hydrocarbons are molecules. They are made out of hydrogen atoms and carbon atoms. Methane is [...]
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06, 2017
What is helium? Atoms, elements, and chemistry
Diagram of a helium atom Helium is a very simple atom. Helium is a simple atom. The nucleus of a helium atom has two protons and two neutrons. Around the nucleus, [...]
