Latest Rachel Wood Stories
Located on dry land in Namibia is a 550-million-year-old reef that researchers say was built by the first hard-shelled animals and is one of the oldest reefs known.
Popular theories have placed the Neanderthal extinction at about 35,000 years ago, based on dating of the earliest bone fossils found at a Neanderthal site in southern Iberia. However, researchers from Australia and Europe are now refuting that evidence after taking another careful look at the bones.
- 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.