Scientists say they have extraordinary new evidence to support a Big Bang Theory for the origin of the Universe.
Researchers believe they have found the signal left in the sky by the super-rapid expansion of space that must have occurred just fractions of a second after everything came into being.
It takes the form of a distinctive twist in the oldest light detectable with telescopes.
Read it all and you may also enjoy BBC explains Big Bang discovery using a sock (a video of about 2 1/2 minutes, watch it all).