During this experiment, spiders were exposed to a variety of drugs to help determine their effect on the brain.

Spiders who had been given marijuana started out well enough, but were unable to maintain focus.

Benzedrine (speed) produced spiders who spun enthusiastically, though no great thought or care was put into the web design.

Caffeine, one of the most common stimulants taken by humans, produced an erratic web.

Chloral hydrate, an ingredient in sleeping pills, made the spiders doze off after barely getting started on the web.

Though this 1995 experiment sought to determine toxicity of drugs, it was a continuation of experimentation of spiders on drugs that had started in 1948 by P. N. Witt. ...

A stent is a small mesh tube that's used to treat narrowed or weakened arteries in the body. Arteries are blood vessels that carry blood away from your heart to other parts of your body.

You may have a stent placed in an artery as part of a procedure called angioplasty. Angioplasty restores blood flow through narrowed or blocked arteries. Stents help prevent the arteries from becoming narrowed or blocked again in the months or years after angioplasty.

In the early 1900s, the disease pellagra was widespread in the United States, especially in southern states. Individuals with pellagra were weak, and they developed diarrhea, a skin rash, and mental confusion. Each year, thousands of Americans died from this dreaded illness. In 1914 the U.S. surgeon general assigned Joseph Goldberger, a physician who worked in a federal government laboratory, to study pellagra. Most medical experts thought pellagra was an infectious disease because it often occurred where people lived in close quarters, such as prisons, orphanages, and mental health institutions. Goldberger knew from his previous research that infectious diseases usually spread through a population by close physical contact. While investiga ...

Pupula duplex - commonly called double pupil - is a rare medical condition, in which one's eye or eyes has two pupils.

Read more: Pupula duplex

This announcement is the result of over 30 years of extensive research. It was determined that prenatal exposure to low levels of mercury through fish in the mother’s diet or the environment does not contribute to disorders on the Autism spectrum.

The earliest evidence of ancient dentistry we have is an amazingly detailed dental work on a mummy from ancient Egypt that archaeologists have dated to 2000 BCE.

Brain electronic interfaces can make a blind person to see, a deaf person to hear, and help people to increase their memory capacity.