Background: Although various angiosperms (including their flowers) have been reported from the Yixian Formation (Lower Cretaceous) of China, which is famous worldwide for its fossils of early angiosperms, no flower bud has hitherto Helmet been seen in the Early Cretaceous.Such a lack of examples hinders our understanding of the evolution of flowers
On its own, a single cell cannot exert more than a microscopic influence on its immediate surroundings.However, via strength in numbers and the expression of cooperative phenotypes, such cells can enormously impact their environments.Simple cooperative phenotypes appear to abound in the microbial world, but explaining their evolution is challenging
To our knowledge, this is the first case report of a transudative pleural effusion with positive Cryptococcal antigen and culture.We describe a 32-year-old male with end-stage liver disease (ESLD) who presented to an outside hospital with dyspnea and a large pleural effusion.An initial pleural fluid analysis was positive for Cryptococcal Ag.However
It is significant for identifying mass movement patterns to invert horizontal tectonic stresses at different depths underneath Tibet.In recent years, a large number of achievements focusing on two-dimensional tectonic stresses have been obtained from gravity data.However, three-dimensional tectonic stresses in Tibet are still unknown or debatable.T