The Harvard College Observatory Computers from c. 1880 into the early 20th century were:
A) the first digital computers.
B) not much different than cash registers.
C) functionally similar to the modern 4- function calculator.
D) a group of women who made important contributions to astronomy.
E) mechanically operated adding machines.
Question 2
Typical stellar spectra appear as:
A) a series of bright, colored lines.
B) an unbroken rainbow of colors.
C) a rainbow, but with some dark lines mixed in.
D) a rainbow with some bright lines on top of the continuum.
E) a very redshifted rainbow due to the expansion of the universe.
The Taung Child, the first of the australopithecines to be discovered, is the type specimen for Aust
In The Gross Clinic (1875), by Thomas Eakins, Professor Samuel Gross’s team of surgeons cuts through
Wang Guochen, c. nineteenth century
Offshore spawning stock biomass, Grand Bank Atlantic Cod since the early 1980s
Early 20th century warming
Evidence of early bipedalism