Science theories and discoveries

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Science theories and discoveries

Jean Piaget theory of child development and cognition 1940ish. Probably no other theory has undergone such scrutiny and verification than his ideas for the development of mathematico-logical reasoning. Particularlly with respect to conservation and formal operational thinking. Questions with respect to the generalization of his ideas from research on his children to the world's population have been repeatedly investigated with virtually all cultures on Earth and have withstood all attempts to find counter examples. Further, his theory and subsequent studies have refuted Bruner's claim that anyone can learn anything at any age if it is presented to them in an appropriate instructional sequence.

DNA first identified 1953 Francis Crick and James Watson

Plate tectonics 1970's thought the continents were permanently attached to the surface of the Earth

Identified the human genome with 32 000 genes in 2001


Serendipity discoveries:

Bell 1875 when Watson was freeing a spring on the transmitter and caused a click that was heard by Bell at the receiver in another room (telephone).

Fleming 1928 noticed air borne material killed mold in his experiments. The airborne material penicillin. Later Gladys Hobby, Martin Henry, and Karl Meyer relized the importance of this and perfected penicillin and later Hobby perfected Terramycin.


Jack St. Clair Kilby invented the integrated circuit after he was turned down by MIT as a student for an advanced degree in electronics. He later said it was because he didn't know it wasn't supposed to work that he tried it and found that it did.


Brain research

Eric Kandel showed that short-term memory involves changes in synapse strength, and, for long term memory, new synapses are created.




Dr. Robert Sweetland's Notes ©