Broca’s area is the part of the brain associated with motor control of speech.
It is usually located in the left but sometimes in the right inferior frontal convolution.
It is named after its discoverer, the nineteenth-century French surgeon Paul Broca.
Charles Darwin did not come up with the phrase survival of the fittest. The British philosopher and scientist Herbert Spencer introduced the phrase in Principles of Biology (1864-1867) as a way of describing Darwin’s theory of natural selection.
The light from a firefly comes from an area on the sides of its stomach. Fatty tissue located there contains air tubes and nerves that when stimulated give off oxygen. The oxygen combines with a pigment in the fat called luciferin, producing the familiar heatless light.
Plastics are only one kind of polymer, a substance composed of very large chain-like molecules that consist of smaller, repeating chemical units. Natural polymers include proteins, cellulose, diamonds, and quartz. Besides plastics, man-made ones include concrete, glass, and paper.
Cape Flattery, Washington, and a point on the Florida coast south of Miami. They are 2,835 miles apart.
The Adam’s apple refers to a legend that claims a piece of the forbidden fruit stuck in Adam’s throat. This part of the throat is actually a projection of the thyroid cartilage of the larynx.
Both stalagmites and a stalactites are elongated deposits of minerals at points where slowly dripping water enters a void. Stalagmites build from the bottom of such a cavity; stalactites hang from the ceiling. When the same dripwater source creates both a stalactite and a stalagmite, the two may meet and form a column.