As of October 3 rd, 2022, the COVID-19 pandemic has led to more than 615 million cases of severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), along with over 6.5 million deaths globally, ...

Meiosis is a specialized form of cell division that produces reproductive cells, such as plant and fungal spores, sperm and egg cells. Men's testes were once thought to be free of bacteria, but a ...

During mammalian reproduction, millions of sperm undertake a journey that only one will finish. This journey to fertilization has been commonly viewed as a race: a sea of sperm competing to get to the ...