Discrete energy levels (eigenvalues) in atoms (noticed by experiments in spectroscopy) could not be explained by Newtonian Mechanics. Also, the wave-like nature of electrons (eg: diffraction) indicated the first signs of wave-particle duality. These were the first clues.
I Absolutely have NO clue but I'm still posting this up :P
Not if they have the faintest clue what they're doing. Parallax is used to measure distance, not temperature.
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Haven't got a CLUE! :D
I Absolutely have NO clue but I'm still posting this up :P
P23HRFXFXP type this code in your cards to unlock a clue
I have no clue
No clue. Do you mean astronomers? They are scientists working in astronomy.
Scientists can learn many things. They can learn how large a dinosaur was, what it looked like, what it ate, and how it moved, to name a few things.
not a clue
i have no clue
Quantum Leap - 1989 Rebel Without a Clue - September 1 1958 3-9 was released on: USA: 30 November 1990 Japan: 11 July 2008
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Aloe, and the fact that they were madrigals
The Aloe Clue and that they were Madrigals
How old it is and what gases it is made up of.