Search results
Results From The WOW.Com Content Network
In the 19th century, it acquired a meaning more closely related to biological deformities, mostly in the field of botany. Currently, its most instrumental meaning is that of the medical study of teratogenesis, congenital malformations or individuals with significant malformations. Historically, people have used many pejorative terms to describe ...
30th century BC: 29th century BC: 28th century BC: 27th century BC: 26th century BC: 25th century BC: 24th century BC: 23rd century BC: 22nd century BC: 21st century BC: 2nd millennium BC · 2000–1001 BC 20th century BC: 19th century BC: 18th century BC: 1790s BC: 1780s BC: 1770s BC: 1760s BC: 1750s BC: 1740s BC: 1730s BC: 1720s BC: 1710s BC ...
The history of biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine and the works of Aristotle, Theophrastus and Galen in the ancient Greco-Roman world.
The disease killed an estimated 25 percent of the adult population of Europe during the 19th century. [7] The first batch of recordings of audio Made in April 1860. The recordings include a tuning fork, Au clair de la lune, opening lines of Torquato Tasso's Aminta, vocal scale and Fly, little bee. [8]
The earliest evidence for life on Earth includes: 3.8 billion-year-old biogenic hematite in a banded iron formation of the Nuvvuagittuq Greenstone Belt in Canada; [30] graphite in 3.7 billion-year-old metasedimentary rocks in western Greenland; [31] and microbial mat fossils in 3.48 billion-year-old sandstone in Western Australia.
Landmark environmental portraiture and iconography of the Industrial Revolution and 19th century. [s 1] Two Ways of Life: 1857 Oscar Gustave Rejlander: Wolverhampton, England [22] Albumen print [s 1] La Vallée de l'Huisne (River Scene) 1857 Camille Silvy: Nogent-le-Rotrou, France Albumen print [s 1] Fading Away: 1858 Henry Peach Robinson
Epidemics of the 19th century were faced without the medical advances that made 20th-century epidemics much rarer and less lethal. Micro-organisms (viruses and bacteria) had been discovered in the 18th century, but it was not until the late 19th century that the experiments of Lazzaro Spallanzani and Louis Pasteur disproved spontaneous generation conclusively, allowing germ theory and Robert ...
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...