(Encyclopedia) breast cancer, cancer that originates in the breast. Breast cancer is the second leading cause of cancer death in women (following lung cancer). Although the vast majority of the cases…
(Encyclopedia) dementiadementiadĭmĕnˈshə [key] [Lat.,=being out of the mind], progressive deterioration of intellectual faculties resulting in apathy, confusion, and stupor. In the 17th cent. the…
WHAT IS A PROTIST? BIOGRAPHY: LOUIS PASTEUR (1822–1895)VIRUSESBACTERIAFIND OUT MOREAny living thing that is invisible to the naked eye and can be seen only under a microscope is called a…
(Encyclopedia) liposomeliposomelīˈpəsōmˌ, lĭpˈə– [key], microscopic, fluid-filled pouch whose walls are made of layers of phospholipids identical to the phospholipids that make up cell membranes.…
(Encyclopedia) Pygmy or PigmyPigmyboth: pĭgˈmē [key], term used for dark-skinned people who live in equatorial rain forests and average less than 59 in. (150 cm) in height. Some studies make a…
—By Karen Barss The story of human evolution began in Africa about six million years ago and it describes the very long process that our ancestors went through to ultimately become modern humans.…
