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16 07, 2017

The earth in Greek astronomy

By |2019-05-22T11:17:27-07:00July 16th, 2017|Greeks, Science|0 Comments

The earth in Greek astronomy: The Greeks never saw this view of the earth from space! Gaia and the Earth Early Greeks thought of the Earth as the goddess Gaia, the mother of everything. Like a mother, the Earth gave food to people. Who's the goddess Gaia? How old is the Earth? More Greek religion More Greek astronomy [...]

16 07, 2017

Who is Poseidon? Greek gods

By |2018-09-17T09:02:48-07:00July 16th, 2017|Greeks, Religion|1 Comment

The god Poseidon rules the ocean Ocean god Poseidon The Greeks thought of the god Poseidon as a god of violent, unpredictable movement. He is most often the god of the ocean, which is of course the biggest, most unpredictable, and most dangerous thing around. Many Greeks spent a lot of time sailing on the ocean, and they paid [...]

26 06, 2017

What is salt made of? Geology

By |2017-06-26T02:22:44-07:00June 26th, 2017|Geology|0 Comments

Evaporated sea salt Salt molecules are a combination of chlorine atoms and sodium atoms. These atoms mix together easily and, once they are mixed, the salt molecule is very stable and doesn't break apart easily. There is salt on meteors in outer space and on Mars, and probably on lots of other planets [...]

30 05, 2017

What is seaweed? Plant evolution and biology

By |2018-04-16T10:36:48-07:00May 30th, 2017|Biology|0 Comments

Seaweed in the ocean For the first two billion years of life on Earth, there were only one-celled creatures. But after early eukaryote cells started to reproduce by meiosis in addition to mitosis, about 1.4 billion years ago, they were able to evolve faster by mixing up their DNA with the DNA from other cells. They [...]