Growth hormones called auxins makes houseplants turn toward the light.
When light falls on one side of a plant, the auxins tend to concentrate on the shaded side, causing the cells on that side to grow longer.
As a result, the plant gradually leans toward the light.
This bending movement in response to an outside stimulus is known as tropism; bending in response to sunlight is called heliotropism.
Kurt Russell, with songs dubbed by Ronnie McDowell, played Elvis Presley in the TV movie “Elvis” (1979). The film was directed by John Carpenter.
The orbit of the moon around the earth is tilted at an angle of about 6 degrees from the plane of the earth’s orbit around the sun. As a result, the moon is usually above or below the line between the earth and the sun, except on certain predictable occasions.
A human embryo has its first heartbeat at the age of three weeks, when the heart of the embryo looks like a tube. As it begins to beat, it starts the blood circulating through the few blood vessels that have formed around it.
Quicksand doesn’t work by pulling you down. Quicksand is nearly always found above a spring, which creates a supersaturated condition that makes the sand frictionless and unable to support weight. In addition, quicksand is airless, which creates suction as you struggle to get free. The most effective way to escape quicksand is to position yourself…
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.
The largest plant in the world is said to be the General Sherman Tree, a giant sequoia in Sequoia National Park, California. The tree is about 272 feet tall and more than 100 feet in circumference. It is about 3,500 years old.