Related by context. Frequent words. (Click for all words.) 59 Newtonian 58 Newtonian physics 56 unobservable 55 quantum theory 55 relativistic 54 spacetime 54 cosmological 53 quantum mechanics 52 gravitation 52 general relativity 52 fermions 51 Brownian motion 51 Hawking radiation 51 singularities 51 entropy 51 dynamical 50 symmetries 50 Theorists 50 quantum mechanical 50 relativity 49 quantum physics 49 cosmological constant 49 indeterminacy 49 quantum entanglement 49 thermodynamics 49 quantized 49 entropic 49 subatomic 49 irreducible complexity 49 bosons 49 Aristotelian 48 Einstein theory 48 testable 48 observable universe 48 cosmic 48 quantum gravity 48 transmutation 48 electromagnetism 48 excitations 47 gravitational attraction 47 topological 47 supersymmetry 47 purely theoretical 47 simultaneity 47 galaxy formation 47 morphologies 47 theoretic 47 singularity 47 thermodynamic 46 multiverse 46 circularity 46 quanta 46 teleological 46 cosmology 46 crystal lattice 46 ontological 46 universals 46 nonliving 46 macroscopic 46 superposition 46 interplanetary spacecraft 46 phonons 46 geometry 46 superfluid 46 celestial bodies 46 quadratic 46 scalar 45 planetary 45 gravitational lensing 45 interpretable 45 physics 45 solar nebula 45 quantum bits 45 astronomical observations 45 cuprates 45 prokaryotes 45 Higgs particle 45 dialectics 45 theoretical 45 Computer simulations 45 spatial dimensions 45 colliders 45 immutability 45 planets 45 sublimating 45 Darwinian evolution 45 invariant 45 relativist 45 atomic nuclei 45 equations 45 electron density 45 isotopic composition 45 positivist 45 metaphysics 44 meteoroid 44 anisotropy 44 Darwinian theory 44 plate tectonics 44 positron 44 subatomic particle 44 phenomenological