[Answer] 2. Libraries use a system of classification of books devised by a man in 1876 whose first name was Melvil. What was his last name?

Step 1 : Introduction to the question "2. Libraries use a system of classification of books devised by a man in 1876 whose first name was Melvil. What was his last name?"

...1. Hughes 2. Dewey 3. Louis 4. Lewis Melvil Dewey was a librarian who had the task of organizing the library at Amherst College. He used a decimal system which he supposedly developed from writings of Roger Bacon, a system he copyrighted in 1876. Although many libraries now use the Library of Congress system, the Dewey Decimal System is still in wide use. Dewey was a leader in developing Lake Placid as a cultural and recreational center. He also tried to up-date English language spelling. In 1927, for instance, he arranged a menu of Hadok, Poted beef with noodls, Parsli or Masht potato, Butr, Steamd rys, Letis, and Ys cream and added "All shud see the butiful after-glo on mountains to the east just befor sunset. Fyn vu from Golfhous porch." His given name was Melville which he changed to Melvil. Also, his middle name was Louis.

[Answer] Under modern classification systems, in what clade will you find birds?

Step 1 : Introduction to the question "Under modern classification systems, in what clade will you find birds? "

...Hint :Reptiles

[Answer] 2. This influential American astronomer devised a classification system for galaxies. He also discovered the relationship between a galaxy's distance from Earth and its speed relative to it, thereby establishing that the universe is expanding. Who was he?

Step 1 : Introduction to the question "2. This influential American astronomer devised a classification system for galaxies. He also discovered the relationship between a galaxy's distance from Earth and its speed relative to it, thereby establishing that the universe is expanding. Who was he?"

...1. Harlow Shapley 2. G�rard de Vaucouleurs 3. Edwin Hubble 4. George Ogden Abell Edwin Hubble, a Missouri native, was born in 1889 and he joined the staff at Mount Wilson Observatory in 1919. His main contribution to astronomy is the discovery that some "nebulae" are really galaxies beyond the Milky Way and that the universe as a whole is expanding. The Hubble Space Telescope, launched in 1990, was named in his honor. -StetsonHat

[Ans] Who made the decision in 2006 to demote Pluto to classification as a dwarf planet?

Step 1 : Introduction to the question "Who made the decision in 2006 to demote Pluto to classification as a dwarf planet?"

Pluto is the largest and second-most-massive known dwarf planet in the Solar System and the ninth-largest and tenth-most-massive known object directly orbiting the Sun.

Step 2 : Answer to the question "Who made the decision in 2006 to demote Pluto to classification as a dwarf planet?"

International Astronomical Union (IAU) :

In 2005, Eris, a dwarf planet in the scattered disc which is 27% more massive than Pluto, was discovered. This led the International Astronomical Union (IAU) to define the term "planet"formally in 2006, during their 26th General Assembly. That definition excluded Pluto and reclassified it as a dwarf planet.

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