What is snow? Weather – Earth science
If it's colder, rain may fall as snow. About two and a half billion years ago, the Earth finally cooled down enough for it to snow for the first time. Most of the [...]
20
08, 2017
20
08, 2017
Why does it rain? Weather – Earth science
Thanks to Rocbike for the great picture! When the Earth first formed, about 4.5 billion years ago, it didn't rain here. Until about four billion years ago, Earth was too hot for raindrops to form, [...]
20
08, 2017
Nimbus clouds – Rain clouds – Weather
Cumulonimbus clouds are a type of nimbus cloud What is a nimbus cloud? Nimbus clouds often mean that a thunder storm is brewing: there may soon be thunder and lightning. Get out of [...]
9
08, 2017
Inuit history – Native Americans
Inuit history - an Inuit carving of a sea lion The early Inuit The Inuit lived along the eastern coast of Siberia and in Alaska, on both sides of the [...]
7
08, 2017
Inuit houses – Igloos
An Inuit village in 1575 AD Most of the time, most Inuit people lived in wooden houses built near the coast, where they could get to their fishing boats easily. They built [...]
18
07, 2017
Who was Anaxagoras? Greek scientist
Anaxagoras came from Clazomenae: A map showing Clazomenae Where was Anaxagoras from? Like Thales before him, Anaxagoras was born in what's now Turkey. Anaxagoras was born around 500 BC in a city called Clazomenae, [...]
6
07, 2017
Ancient Greek weather
Greek weather and environment: a map of Greece Weather changed with the seasons The weather in ancient Greece, like the weather in most places, changed with the seasons. Greek weather [...]
27
06, 2017
Early European environment: northern Europe
Black Forest in Northern Europe: the early European environment had a lot of forests like this one. Not so different from Central Asia When people first arrived in northern Europe [...]
25
06, 2017
Where are the Himalaya Mountains? India
Himalaya Mountains India breaks off of Africa About 55 million years ago, plate tectonics made the land that is now India break off from what is now Africa. At this [...]
2
06, 2017
What is water made of? Molecules and chemistry
A big ocean wave The first molecules of water formed out in space, about 14 billion years ago, as part of the nebula left over after an early star exploded [...]
