Flight feather (Milvus milvus) in flight, showing remiges and rectrices
Flight feathers are the long, stiff, asymmetrically shaped, but symmetrically paired feather s on the wing s or tail of a bird ; those on the wings are called remiges (singular remex) while those on the tail are called rectri more
Nicotinamide adenine dinucleotide
Nicotinamide adenine dinucleotide, abbreviated NAD+, is a coenzyme found in all living cell s. The compound is a dinucleotide, since it consists of two nucleotide s joined through their phosphate groups: with one nucleotide containing an adenosine ring, and the more
Platypus
The Platypus (Ornithorhynchus anatinus) is a semi-aquatic mammal endemic to eastern Australia , including Tasmania . Together with the four species of echidna , it is one of the five extant species of monotreme s, the only mammals that lay eggs instead of giving birth to live young. I more
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
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