This is one of those questions that probably has no decisive answer, especially since the phrase has probably changed its sense over the years. Nowadays it means that the person being addressed is out of contact with reality. In that sense it certainly dates back at least to the 1960s. But back in the 1940s Gerarld Kersh wrote a story called "The Copper Dahlia" in which the hero tries to contact a fleet of aliens approaching the Earth to bring happiness to everyone. So it could date back that far or even further.
It just means you are puzzled or surprised. Example: "How on Earth did the dog get on top of the house?"
The earth began 4.6 billion years ago.
nothing
In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt?
In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt?
It's not an idiom - it means just what it seems to mean. Someone is waiting for the century to either end or begin.
1956
Give us the expression, and we'll have our staff begin work on it.
To exclude someone
No there is no such expression.
It is a slang expression meaning to nag, yell, or be upset at someone for something or even nothing but just for the sake of nagging, or "ragging on someone".
One social expression example is when you say "Bless you" when someone sneezes. Another popular social expression is saying "Congratulations" when something wonderful happens to someone you know.
Rivers and ravines are earth words. They begin with the letter r.
Exponent, expression, e (natural log)
for loop and while loop need the expression to be true for further execution of the program.
earth earthquake
The expression "Dang It" is usually used when someone is frustrated or annoyed - "Darn" or "Damn" could be another expression used.