The universe+ 4 dimensions began  because of big bang . the explosion was so big the gas is spreading today at great speed
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the four d = depth,width,length and time
plz mark it as the brainliest ans
The universe starts frrom big bang theory . In first trillionth of a second the temperature of the universe was ten billion trillion trillion degree Celsius because of which the universe is expanding at the speed of 70km per sec.