Spider embryo with a loss of the waist region upon knockdown of the gene waistless. Hoechst staining with fluorescent stereomicroscopy. An ancient gene is crucial for the development of the ...

A widespread bacteria called Wolbachia pipientis and a virus that it carries can cause sterility in male insects by hijacking their sperm, preventing them from fertilizing eggs of females that do not ...

Despite differences in shape and size all insects are characterized by a body organization that includes three units: a head, thorax and abdomen (panels A-B). In contrast all spiders (and other ...

The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery. The process of how a humble single cell becomes an organism fascinates scientists across ...