Scientists believe they have recorded echoes from the Big Bang, known as "primordial gravitational waves". Researchers at Harvard Smithsonian University Centre for Astrophysics (Cfa) believe they have picked up ripples left over from the Big Bang for the first time, the Telegraph reports. Astrophysicists have been searching for these waves since they were first predicted by Albert Einstein almost 100 years ago. The waves are tiny vibrations that spread out through space following the huge explosion at the start of the universe. These primordial gravitational waves were sent out into space a trillionth of a second after the Big Bang. If their findings are correct, this would provide strong evidence to support the idea that the universe is expanding faster than the speed of light. It could also mean scientists would be able to work out exactly how big the universe is. Read more >>
The cartoon by Mac from the Daily Mail shows the moment when the astronomers hear what they believe to be the echoes of the Big Bang for the first time. In reality, it's a workman on a ladder hammering a nail into the wall in an adjoining room.
An echo (pronounced 'ecko') is a sound that is heard after it has been reflected off a surface such as a wall or a cliff. • The echoes of his scream sounded in the cave for several seconds.