Latest Placodonts Stories
Scientists have been unclear about the evolutionary origins of ancient ocean-dwelling dinosaurs known as placodonts. But a new fossil find has shed light on not only the origin of the extinct dinosaur but also on its place in the tree of life.
Word of the Day
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
The word 'pawl' probably comes from a Latin word meaning 'stake'.