Very Early Universe
All ideas concerning the very early universe (cosmogony) are speculative. No accelerator experiments have yet probed energies of sufficient magnitude to provide any experimental insight into the behavior of matter at the energy levels that prevailed during this period. Proposed scenarios differ radically. Some examples are the Hartle–Hawking initial state, string landscape, brane inflation, string gas cosmology, and the ekpyrotic universe. Some of these are mutually compatible, while others are not.
Read more about this topic: Timeline Of The Big Bang
Famous quotes containing the words early and/or universe:
“They circumcised women, little girls, in Jesus’s time. Did he know? Did the subject anger or embarrass him? Did the early church erase the record? Jesus himself was circumcised; perhaps he thought only the cutting done to him was done to women, and therefore, since he survived, it was all right.”
—Alice Walker (b. 1944)
“The universe constantly and obediently answers to our conceptions; whether we travel fast or slow, the track is laid for us. Let us spend our lives in conceiving then. The poet or the artist never yet had so fair and noble a design but some of his posterity at least could accomplish it.”
—Henry David Thoreau (1817–1862)