hand

Proprioception

...brush paint onto a canvas without looking at the hand as it moved the brush over the canvas; it would be impossible to drive an automobile because a motorist would not be able to steer or use the foot pedals while looking at the road ahead; we could not touch type or perform ballet; and one would no...

Natural selection

...thing of these slow changes in progress, until the hand of time has marked the long lapses of ages, and then so imperfect is our view into long past geological ages, that we only see that the forms of life are now different from what they formerly were. Darwin ends his book with an often quoted passage:...

Muscle

...ated by anyone closing their eyes and waving their hand around. Assuming proper proprioceptive function, a...o time will the person lose awareness of where the hand actually is, even though it is not being detected by any of the other senses. Several areas in the ...

Louis Pasteur

... of one another. Tediously sorting the crystals by hand gave two forms of tartaric acid: solutions of one form rotated polarised light clockwise, while the other form rotated light counterclockwise. An equal mix of the two had no effect on polarized light. Pasteur correctly deduced that the tartaric acid ...

Francis Crick

...(first published in 1968) is a very readable first hand account of the research by Crick and Watson. The book also formed the basis of the award winning television dramatisation Life Story by BBC Horizon (also broadcast as Race for the Double Helix ). Francis Crick and James Watson: Pioneers in DNA ...

Down syndrome

...ith disabled children, giving future mothers first hand information on life with a disabled child. It has been widely recognized in democratic countries that the housing of people with Down syndrome in psychiatric institutions and their exclusion from society is inapt and ignores their abilities as well ...

Charles Darwin

...g the Beagle expedition let him study at first hand geology, fossils and a multitude of living organisms as well as meeting native peoples. He methodically collected an enormous number of specimens, many new to science, which established his reputation as a naturalist and made him one of the precu...

Cancer

...mulus. For example, a callus that may form on your hand when you first learn to swing a tennis racket or a golf club is produced by hyperplasia. In addition to hyperplasia, microscopic examination of a biopsy specimen can detect another type of noncancerous condition called "dysplasia." Dysplasia is an ...

Aseptic technique in microbiology

...son would hold both of the tubes or flasks in one hand , probably the opposite of the writing hand. The...would use the innoculating loop with their writing hand to retrieve the specimen, and then sterilize the top of the tube or flask again before immediately c...