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Friday, 10 April 2015

Scientist of the day - Charles Darwin

Charles Darwin

Charles Darwin, widely considered as one of the greatest and most revolutionizing scientists in history, was the British naturalist who formulated the theory of evolution. Pre-Darwin, it was thought that each species of life on earth came individually and that none had ever changed its form. He confuted this notion and demonstrated from his research that evolution is the law of nature and all living things on earth have descended from common ancestors who lived millions of years ago. He proved that animals and plants have evolved in an orderly manner and keep on evolving even today.

Early Life:
Born at Shrewsbury in 1809, Darwin was raised by his eldest sister from the tender age of eight. Young Darwin had a passion for gathering up even insects and minerals and he used to experiment with them. When Darwin was 16, he joined Edinburg University to study medicine. However, he was too gentle and tender to become a proper physician. Anatomy, in particular, sickened him. He hated the surgical operations, because they had to be performed without any anesthetics at that time. This made Darwin a great failure as a medical student.
Darwin said goodbye to Edinburg in 1828 and sought admission in Cambridge to study Theology. There, he also disregarded his studies and was more interested in beetles than theology. He was lucky to attain his degree anyhow. At Cambridge, he managed to make valuable friends, even befriending the professors of botany and geology.

Contributions and Achievements:

Darwin got his big break in 1831. A naturalist was needed to travel along on a scientific expedition – a voyage around the world in the brigantine HMBS Beagle under the supervision of Captain Fits Roy. Luckily, some of his Cambridge fellows also recommended him for the place. The voyage took around five years.
Throughout this voyage, Darwin collected bones of extinct animals. He was curious about the relationship between the extinct animals and the existing ones. The unusual marine iguana, the tortoises and the finches on the Galapagos Islands in the pacific made him perplexed, since similar, yet rather distinct, forms of the same animals were found on separate islands. These observations led to his legendary ideas on evolution.
After the return, Darwin moved to London for a while and compiled an account of his travels. Darwin got married to his cousin Emma Wedgowood in 1839. The coupled moved to Downe House in Kent in 1844. There, Darwin got a letter from the naturalist Alfred Russel Wallace, who had made similar observations about evolution separately. A collaborative report by Darwin and Wallace was published in 1858. Darwin publicized the theory of evolution in his famous book, “The Origin of Species by Natural Selection”, in 1859. The book, which asserted that all the varied forms of life on earth could, in the course of time, have evolved from a common ancestry, was a huge success. Darwin also commented that in the struggle for life, only the ‘fittest’ creatures would survive while others fail.
The book became controversial due to its conflict with the religious belief about the creation of the world. However, in later years, it was embraced by all biologists. Darwin’s another book, “The Variation of Animals and Plants Under Domestication”, came out in 1868. It is considered to be his second most significant work. The book maintains that man, by selective breeding, could make rather different breeds of pigeons, dogs, and some species of plants also. His work also included “The Various Contrivances by which Orchids are Fertilised by Insects”, “Insectivorous Plants”, “The Power of Movement in Plants”, “Descent of Man”, and “The Formation of Vegetable Mould Through the Action of Worms”.

Later Life and Death:

Charles Darwin died at 74 and he was buried in Westminster Abbey, fairly near to the tomb of Sir Issac Newton. Out of his 10 children, of whom seven survived him, four became prominent scientists. Three of his sons went on to become fellows of the Royal Society, just like their legendary father.

Wednesday, 8 April 2015

Scientist of the day - John Ray

 John Ray
John Ray was a highly influential English naturalist and botanist whose contributions to taxonomy are considered groundbreaking and historic. He is also well-known in the world of botany for the establishment of species as the ultimate unit of taxonomy.

Early Life and Education:

Born in 1627 in a small village of Black Notley, Essex, John Ray’s father was a blacksmith. Ray entered the Cambridge University at the young age of sixteen.

Contributions and Achievements:

John Ray was selected a Fellow of Trinity College in 1649. However, he lost the position thirteen years later when, in 1662, he declined to take the oath to the Act of Uniformity after the Restoration. With full support of his former stundent and fellow naturalist, Francis Willoughby, Ray made several trips throughout Europe with him, carrying out research in the fields of botany and zoology.
Ray formulated the fundamental principles of plant classification into cryptogams, monocotyledons and dicotyledons in his landmark works “Catalogus plantarum Angliae” (1670) and “Methodus plantarum nova” (1682). Other major publications of Ray include “Historia generalis plantarum” (3 volumes, 1686-1704) and “The Wisdom of God Manifested in the Works of the Creation” (1691), both of which became quite influential during the time.
The zoological contributions of Ray include the developement of the most natural pre-Linnaean classification of the animal kingdom. He was appointed a Fellow of the Royal Society in 1667. Ray endorsed scientific empiricism as compared to the deductive rationalism of the scholastics.

Later Life and Death:

In his later years, Ray moved to his native village, where he remained until his death in 1705. He was 77 years old. The Ray Society was established in his honor in 1844.