The idea that the universe began as a point and expanded, was the Big Bang theory.
Answer:
Cold fronts usually bring cooler weather, clearing skies, and a sharp change in wind direction and as your body experiences cold air, your immune system can fight infection more effectively.
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D. Some European rivers act as international borders.
Answer:
In the Northern Hemisphere the autumnal equinox falls about September 22 or 23, as the Sun crosses the celestial equator going south.
Explanation:
In the Southern Hemisphere the equinox occurs on March 20 or 21, when the Sun moves north across the celestial equator.
