Explore the lytic and lysogenic viral replication cycles with the Amoeba Sisters! This video also discusses virus structures and why a host is critical for viral reproduction. Expand details for table of contents and further reading...

The 1943 Luria–Delbrück experiment, known as the "Fluctuation Test," demonstrated that mutations in bacteria occur randomly rather than as a directed response to environmental stress, such as viral infection. By showing wide variation in...

Rescue teams on the destroyed area after the fire in the JBB meat factory in Lyse. Twisted metal elements of the production hall.

Burnt Buliding of JBB meat factory in Lyse. Trucks, construction equipment and fire-brigades.

Forest around buildings JBB meat factory in Lyse. Production halls destroyed by the fire and some saved buildings.

VOICED: The Chinese art star losing himself in his work

VOICED: Giant flower-festooned poles mark Palm Sunday in Poland

CLEAN: Giant flower-festooned poles mark Palm Sunday in Poland