Forty-eight — hours in two days

1848 entered history as the 'Spring of Nations' — a wave of revolutions swept France, Austria, Germany, Italy, and Hungary. The working class demanded political rights for the first time. Marx and Engels published the Communist Manifesto.

48 hours equals two full days. In business and legal practice, '48 hours' often appears as the standard response or notice period. In cinema, '48 Hrs.' is a classic 1982 action film with Nick Nolte and Eddie Murphy.

Cadmium (Cd) is a chemical element with atomic number 48. Used in nickel-cadmium batteries and nuclear reactors as a neutron absorber. Extremely toxic and a serious environmental pollutant.