People have 206 bones. 
The tiniest bone is inside the ear. It is 3 millimeters long. It is called the stapes, or stirrup.

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Generally refers to the idea that the universe has expanded from a primordial hot and dense initial condition at some finite time in the past, and continues to expand to this day.

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For a fixed amount of an ideal gas kept at a fixed temperature, P [pressure] and V [volume] are inversely proportional (while one increases, the other decreases).

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The EARTH is made of the following CHEMICAL ELEMENTS:
oxygen 46.6 %
aluminum 8.1 %
iron 5%
sodium 2.8 %

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A large asteroid or comet collided with Earth about 65 million years ago. Scientists think that such a large collision would throw so much dust into the air that sunlight would not be able to shine and plants and animals would die.
The dramatic changes in climate that resulted from this huge collision were too much for the dinosaurs. They were not able to survive.

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An object at rest will remain at rest unless acted on by an unbalanced force.
An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. 

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Evolution is the widely held notion that all life is related and has descended from a common ancestor: the birds and the bananas, the fishes and the flowers
 -- all related That is, complex creatures evolve from more simplistic ancestors naturally over time.

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If an object, such a spring, is elongated by some distance x, then the restoring force F exerted by the object is proportional to x. 

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 The melting point of water is 0 °C (32 °F).  
The freezing point of water is the same as the melting point which is 0 °C (32 °F). 

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New cells are formed from other existing cells, and that the cell is a fundamental unit of structure, function and organization in all living organisms.

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