The mineral chalcedony is a microcrystalline type of quartz which replaces the original calcium carbonate of the coral and ...

Most people picture the time of dinosaurs as a steamy, tropical world. But during the Late Cretaceous period, northern Alaska ...

Palaeontologist Sarah Gabbott explains what’s so unusual about her discovery, which she named as part of the process of describing it scientifically. The fossil is about 50cm long and has 46 almost ...