An extract on #makeuponfleek
One significant difference of modern naval battles as opposed to earlier forms of combat is the use of marines, which introduced amphibious warfare. Today, a marine is actually an infantry regiment that sometimes fights solely on land and is no longer tied to the navy. A good example of an old naval battle is the Battle of Salamis.
Most ancient naval battles were fought by fast ships using the battering ram to sink opposing fleets or steer close enough for boarding in hand-to-hand combat. Troops were often used to storm enemy ships as used by Romans and pirates. This tactic was usually used by civilizations that could not beat the enemy with ranged weaponry.
Another invention in the late Middle Ages was the use of Greek fire by the Byzantines, which was used to set enemy fleets on fire. Empty demolition ships utilized the tactic to crash into opposing ships and set it afire with an explosion. After the invention of cannons, naval warfare became useful as support units for land warfare.
During the 19th century, the development of mines led to a new type of naval warfare. The ironclad, first used in the American Civil War, resistant to cannons, soon made the wooden ship obsolete. The invention of military submarines, during World War I, brought naval warfare to both above and below the surface. With the development of military aircraft during World War II, battles were fought in the sky as well as below the ocean. Aircraft carriers have since become the central unit in naval warfare, acting as a mobile base for lethal aircraft.
Virtually all staple foods come either directly from primary production by plants, or indirectly from animals that eat them. Plants and other photosynthetic organisms are at the base of most food chains because they use the energy from the sun and nutrients from the soil and atmosphere, converting them into a form that can be used by animals. This is what ecologists call the first trophic level. The modern forms of the major staple foods, such as maize, rice, wheat and other cereal grasses, pulses, bananas and plantains, as well as flax and cotton grown for their fibres, are the outcome of prehistoric selection over thousands of years from among wild ancestral plants with the most desirable characteristics.
Botanists study how plants produce food and how to increase yields, for example through plant breeding, making their work important to mankind's ability to feed the world and provide food security for future generations. Botanists also study weeds, which are a considerable problem in agriculture, and the biology and control of plant pathogens in agriculture and natural ecosystems. Ethnobotany is the study of the relationships between plants and people. When applied to the investigation of historical plantpeople relationships ethnobotany may be referred to as archaeobotany or palaeoethnobotany. Some of the earliest plant-people relationships arose between the indigenous people of Canada in identifying edible plants from inedible plants. This relationship the indigenous people had with plants was recorded by ethnobotanists.