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The longest known male tusk is 4.05 m (13.3 ft) long (measured along the outside curve) and weighs 115.5 kg (255 lb), with a historical report of a 4.30 m (14.1 ft) long tusk found in Siberia, while the heaviest tusk is 121 kg (267 lb), suggested to have been 125–130 kg (276–287 lb) when complete; [53] [54] 2.4–2.7 m (7 ft 10 in – 8 ft ...
Dinosaur evolution after the Triassic followed changes in vegetation and the location of continents. In the Late Triassic and Early Jurassic, the continents were connected as the single landmass Pangaea , and there was a worldwide dinosaur fauna mostly composed of coelophysoid carnivores and early sauropodomorph herbivores. [ 121 ]
[125] [126] "Scientific fact and theory are not categorically separable", [127] and evolution is a theory in the same sense as germ theory or the theory of gravitation. [128] The theory of evolution does not attempt to explain the origin of life [129] or the origin and development of the universe.
The history of scientific method considers changes in the methodology of scientific inquiry, not the history of science itself. The development of rules for scientific reasoning has not been straightforward; scientific method has been the subject of intense and recurring debate throughout the history of science, and eminent natural philosophers and scientists have argued for the primacy of ...
Scientists report stimulation of mouse muscle fibers in a way similar to the regeneration of severed limbs in newts and salamanders. [54] [55] 16 February – Researchers find a way of manipulating tiny swimming robots, just 1.3 millimetres long, using electric currents in water. [56] [57] 17 February
Since 2015, the WHO European Region has been free of malaria. The last country to report an indigenous malaria case was Tajikistan in 2014. [18] There are about 1300–1500 malaria cases per year in the United States. [41] The United States eradicated malaria as a major public health concern in 1951, [217] though small outbreaks persist. [218]
Lipkin was born in Chicago, Illinois, where he attended the University of Chicago Laboratory School and was president of the student board in 1969. He relocated to New York and earned his BA from Sarah Lawrence College in 1974. At Sarah Lawrence, he "felt that if I went straight into cultural anthropology after college I'd be a parasite.