The earth is spherical. So it is possible to represent it with complete accuracy on a sphere. The reduced scale of a map represented a sphere hinders its use and management.
Snail is a common name that is applied most often to land snails, terrestrial gastropod mollusks. When the word "snail" is used in this most general sense, it includes not just land snails but also thousands of species of sea snails and freshwater snails.
A geomagnetic reversal is a change in the Earth’s magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth’s field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was the opposite.
Corals are marine invertebrates in class Anthozoa of phylum Cnidaria typically living in compact colonies of many identical individual "polyps". The group includes the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.
The geomagnetic field is the magnetic field that extends from the Earth’s inner core to where it meets the solar wind, a stream of energetic particles emanating from the Sun. It is approximately the field of a magnetic dipole tilted at an angle of 11 degrees with respect to the rotational axis.
The baleen whales, also called whalebone whales or great whales, form the Mysticeti, one of two suborders of the Cetacea (whales, dolphins, and porpoises). Baleen whales are characterized by having baleen plates for filtering food from water, rather than having teeth.
The term mildew is often used generically to refer to mold growth, molds can thrive on many organic materials, including clothing, leather, paper, ceilings, walls and floors of homes or offices with poor moisture control. Black mold grows in attics.