1. Once a year on Earth
lasted 486 days, it was about 800 million years ago, before the birth of
ancient life in the era of large-scale glaciation of the Earth. Hundreds of
millions of years later, in the era of the dinosaurs, the year was reduced to
370 days. He is now, as you know, is 365 days. What is happening? The facts
that the Earth rotates more slowly, because it "slows down" lunar
gravity.
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Monday, August 3, 2015
Thursday, July 30, 2015
What are the limits of human vision?
From observations of
distant galaxies light years from us to the perception of invisible colors,
Adam Hedheyzi on BBC explains why your eyes can do incredible things. Take a
look around. What do you see? All these colors, the walls, the windows,
everything seems obvious, as it should be here. The idea that we all see it
because the particles of light - photons - that bounce off of objects and fall
into human vision, it seems incredible.
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