Latest Christian Petersen Stories
Most people don't think worms are cool.
A seldom-studied gene known as notum plays a key role in the planarian's regeneration decision-making process.
Amputations trigger a molecular response that determines if a head or tail will be regrown in planaria, a flatworm commonly studied for its regenerative capabilities.
- 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.