Summary
Sharks appeared 220 million years before dinosaurs. The first sharks began to live in the seas 450 million years ago.
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Summary
Sharks appeared 220 million years before dinosaurs. The first sharks began to live in the seas 450 million years ago.
shared 60 info • 1 month ago
There is a practical suggestion for those who have to chop onions: You can avoid crying by chewing gum.
Crickets exhibit a mathematical relationship with the sounds they produce. Do you have any knowledge about this interesting mathematical structure behind their sounds?
The weight of the Earth is 6,588,000,000,000,000,000,000,000 tons. This weight is related to the planet's layers and structure. The inner core is made of iron and nickel, while the outer core is liquid. It is important for future generations to understand this planet.
Explosions in space movies are loud, but in reality sound cannot propagate in vacuum. Sound needs a medium to carry vibrations, and space lacks it.
A river looks the same, yet water molecules constantly move. Flow, diffusion, and turbulence remake the water at a point within seconds.
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