Although academic awareness of African people hunting with poison-tipped arrows extends through centuries, knowledge of this inventive practice remained scattered among entomology, anthropology and chemistry texts.

Transparent solar is based on a fact about light that is taught in elementary school, sun transmits energy in the form of invisible ultraviolet and infrared light, as well as visible light.

Irwin Rose, a biochemist who shared the 2004 Nobel Prize in chemistry for discovering a way that cells destroy unwanted proteins the basis for developing new cancer therapies has died.