Sara Goudarzi at Space.com:
New research suggests evidence of dark energy in our cosmic backyard, but theorists are still divided on explanations for the ever-increasing speed with which the universe is expanding.
Until now, evidence for dark energy, a mysterious antigravity force apparently pushing galaxies outward at an accelerating pace, has only been found in the farthest reaches of the universe. But an international team of researchers has used computer models supported by observations from the Hubble Space Telescope to find hints of dark energy closer by.
More here.