The Latin term “hydroponic” literally means working water. It basically means growing plants in any medium other than soil. All plants require inorganic nutrients such as potassium, sulphur, magnesium and nitrogen and in hydroponics, these nutrients are often provided through a liquid or gel solution.
The simple answer is because plants stop producing chlorophyll toward the end of summer. The carotenoids, the pigments in the photosynthesizing cells, are present during the growing season but are overshadowed by the green chlorophyll while it is present. Starting in the fall, the trees don’t have enough water or light for photosynthesis so they […]
John Scopes was a high school biology teacher who was brought to trial in Dayton, Tennessee in 1925 for teaching the theory of evolution. He was protesting a state law that made teaching anything that denies the divine creation of man. The trial may be considered the first of what we would today call a […]
While many people associate this phrase with Darwinism, and rightfully so, it was actually coined by the English sociologist Herbert Spencer (1820-1903). It is one of the principles of Darwin’s Natural Selection theory that basically says that animals that are less well-adapted to their environment are less likely to survive (and propagate their species) than […]
CFCs are hydrocarbons in which some or all of the hydrogen atoms have been replaced by fluorine atoms. They are often used as refrigerants, solvents and until recently as propellants in aerosol cans. When released, they rise high into the Earth’s atmosphere where they interact with the Sun’s ultraviolet rays.
We’ll never know for certain, but the smallest dinosaur yet discovered is the Microraptor, a small bird-like theropod which is thought to have been about 18-24 inches long. Prior to this, the Compsognathus, another theropod was thought to have been the smallest dinosaur.
It is believed that the Brachiosaurus is the largest dinosaur that ever lived. It is also the largest species in which a whole skeleton has been discovered. This skeleton is in the Humboldt Museum in Berlin and measures 73 feet long and 46 feet tall. Its estimated weight is 35 tons, or about 70,000 pounds.