This means that according to the uncertainty principle that rules atoms, they are spread out and overlap.

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In science, the Uncertainty Principle says that you cannot precisely measure anything past a certain level of precision because the mere act of observing distorts the object of the measurement.

FORBES: Perfect Numbers

Scientists in Spain have managed to produce measurements that are more precise than those predicted by the Heisenberg Uncertainty Principle.

FORBES: Scientists Beat the Heisenberg Uncertainty Principle

That is the limit imposed by Heisenberg's famous uncertainty principle (which states that the precision of a time measurement is limited by the precision of a corresponding energy measurement).

ECONOMIST: Small-scale physics

Heisenberg's uncertainty principle, one of the central tenets of quantum mechanics, maintains that you cannot pin down all the physical properties of a particle at the same time.

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The precautionary principle states that, if there is uncertainty regarding the effects of exposure to an agent, the burden of proof that exposure does not cause harm falls on those who utilize the agent.

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Einstein had objected to Werner Heisenberg's uncertainty principle and, in general, to the statistics-based, ultimately random foundation of life Bohr was promoting.

FORBES: INCOMPARABLE CARVER

The precautionary principle, which calls for extra prudence in areas of scientific uncertainty, also applies.

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Given the level of uncertainty and the political and ethical challenges mentioned above, the international community feels it is critical to uphold the precautionary principle.

UNESCO: MEDIA SERVICES