Dark Energy Is Real, Despite Claim to the Contrary

The galaxy cluster Abell 1689 is famous for the way it bends light in a phenomenon called gravitational lensing. Study of the cluster has revealed secrets about how dark energy shapes the universe. (Image: © NASA, ESA, E. Jullo (JPL/LAM), P. Natarajan (Yale) and J-P. Kneib (LAM)) A new study suggests that dark energy might not be real after all. But other scientists have found major flaws with this bold claim. Dark energy is a mysterious and hypothetical form of energy that is used to explain the accelerating expansion of…

Incredible ‘Heslington Brain’ Resists Rotting for 2,600 Years. Here’s How.

Here’s how the famous Iron Age ‘Heslington brain’ got preserved. Scientists are amazed that a human brain could persist for 2,600 years. (Image: © Axel Petzold/Journal of the Royal Society Interface) In 2008, archaeologists were stunned to discover a human brain dating to the Iron Age. The finding seemed to defy basic biology; human brains, like any other soft tissue, typically decay soon after death. But now, scientists have figured out how this brain remained intact for 2,600 years. Multiple factors, they said in their new study, played a role,…