Male and female butterflies switch courting roles depending on the season they were born in, according to new research.

Officials shut 4,700 farms in Germany amid a scandal over animal feed contaminated with the poisonous chemical dioxin.

Scientists say jets of super-heated gas, called spicules, could be responsible for maintaining the extraordinary high temperatures in the Sun's outer atmosphere.

Leaf-cutter ants "retire" from their cutting job when their teeth become blunt with age, researchers discover.