Volcanoes spew larger fragments than this, but scientists classify them as cinders, blocks or bombs. Volcanic ash is hard and, due to each particle's jagged form, abrasive to the touch. The exact mineral makeup of the ash depends on what minerals were present in the magma. Once ...
the storm has reached hurricane levels. At that point, scientists use a 1 to 5 scale known as the Saffir-Simpson Hurricane Wind Scale to classify hurricane strength, with Category 1 being the least severe hurricanes and Category 5 being the strongest. Some scientists...
For a short while, the five kingdoms seemed to serve scientists well. But in the 1970s, a scientist named Carl Woese decided to classify organisms based on genetic differences rather than differences in visual appearance. When Woese began his classification efforts, he noticed that there were dis...
On planet Earth, there are so many natural structures that are quite diverse in size and color, such as mountains, volcanoes, valleys, etc. However, scientists say that many of these structures are only made of one or a combination of the three types of rocks....
Single-celled amoebae can remember, make decisions and anticipate change, urging scientists to rethink intelligent behavior.
Complicating the matter are “cryptic” species, which look the same to the human eye, but genetically are quite different, making them that much harder for scientists to classify. “When we go out in nature and we see individual organisms, they don’t wear little name tags, they don’t...