A snack here, a ready-meal there. Ultra-processed foods are woven into everyday life, often without much thought. However, new research suggests the question is not only whether these foods contain too much sugar, salt or fat. It may also be whether the way food is processed changes its relationship with the brain.

A distant icy object beyond Neptune has revealed a surprising hint of activity, raising a mystery that could change how astronomers think about the smallest worlds at the edge of the Solar System.

Modern octopuses are known as escape artists of the sea, soft-bodied, elusive, and almost impossible to pin down. But a new fossil discovery is challenging that familiar image. Hidden inside ancient rocks, scientists have found rare clues that suggest the early story of octopuses may have been far more dramatic than anyone expected.