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History of Science

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Apollo 7 crew

THREE’S COMPANY  Twenty months after the deadly fire on Apollo 1, Apollo 7 and its crew (from left),  Donn F. Eisele, Walter M. Schirra, Jr. and Walter Cunningham, spent nearly 11 days in space, completing 163 orbits of Earth.

a photo of a face with two different eye colors

LAWS OF INHERITANCE  Mosaics, individuals whose cells are not all genetically identical, are among the topics discussed in a new book about heredity. Mosaicism can cause a person to have two different colored eyes.

Pluto

The International Astronomical Union’s vote in 2006 to demote Pluto to dwarf planet status merely created “the illusion of scientific consensus,” according to a recent paper.

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