Louis Slotin
Louis Alexander Slotin (December 1 , 1910 – May 30 , 1946 ) was a Canadian physicist and chemist who took part in the Manhattan Project . He was born and raised in the North End of Winnipeg , Manitoba . After earning both his Bachelor of Science and Master of Science degrees fro more
History of biology 's evolution-themed poem The Temple of Nature shows a goddess pulling back the veil from nature (in the person of Artemis ). Allegory and metaphor have often played an important role in the history of biology.
The history of biology traces the study of the living world from anci more
Convention on Psychotropic Substances
The Convention on Psychotropic Substances is a United Nations treaty designed to control psychoactive drug s such as amphetamine s, barbiturate s, and psychedelics . During the 1960s, drug use increased greatly around the world, especially in Western nations. more
Technetium
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| Electron affinity || -53 kJ/mol
Technetium () is the lightest chemical element with no stable isotope . It has atomic number 43 and is given the symbol Tc. The chemical properties of this silvery grey, crystalline transition metal are inte more
Down syndrome
Down syndrome or trisomy 21 (usually Down's Syndrome in British English
Characteristics
known as Brushfield spots
Individuals with Down syndrome may have some or all of the following physical characteristics: oblique eye fissures with epicanthic skin fold s on the inner corner of more