National parks — islands in a desert?

How effective is biodiversity conservation of European and African national parks? This seems to be strongly associated with societal and economic conditions. But even under the most favorable conditions, conservation efforts cannot completely halt eme…

Road signs for immune defense cells

How do killer T cells recognize cells in the body that have been infected by viruses? Matter foreign to the body is presented on the surface of these cells as antigens that act as a kind of road sign. A network of accessory proteins — the chaperones -…