... Gravitational wave search provides insights into galaxy evolution and mergers . ... Recycling galaxies caught in the act . A team of astronomers has found in six galaxies between 5 and 8 billion light-years away the first direct evidence that gas adrift in intergalactic space does indeed flow back into star-forming galaxies. ... Large amounts of gas are caught in transit, but will reenter the galaxy in due time. ... Only registered members of Astronomy.com are allowed to comment on this article. ...