ROMAN EMPIRE The city Rome founded Tarquinius succeeds the throne Tarquinius succeeds the throne Rome becomes republic Latins are defeated near the lake Regillus War with the Latins Rome colonizes and conquers Italy First Roman coins currency Direct taxes Roma...

DARK MATTER First evidence dark matter Fritz Zwicky Sinclair Smith's observation the Virgo Cluster Horace Babcock observes rotation stars the Andromeda Galaxy Jan Oort found same result Babcock did with another galaxy Franz Kahn and Woltjer studied movements w...