Biochemistry, and Science

DNA (an abbreviation for the chemical name deoxyribonucleic acid) is present in cells throughout our bodies. The composition of an individual s DNA provides the equivalent of a fingerprint in identifying that individual. Because methods have now become available for analyzing DNA, such analysis has played a more and more important role in forensic science. 

In response to arguments about the validity of courtroom use of DNA identification, the National Academy of Sciences conducted a review. They concluded that there is no reason to question the rehahihty of properly analyzed DNA evidence. 

Historically, the natural sciences have been associated with observations of nature—our physical and biological environment. A traditional classification 

In the late 1800s, Scottish surgeon Benjamin Richardson was searching for anesthetics. Even though ether anesthesia had revolutionized dentistry and surgery in the 1840s, it had a number of undesirable side effects. In 1874, Richardson published his experiments describing how he prepared an alcoholic 

Image from a thirteenth-century medical manuscript. Plant screams were reported to kill humans. 

---