The 1918 flu killed at least 50 million people, more than died from battle in World War I.
Nutrient-rich dust from the Saharan Desert blows across the ocean to the Amazon.
After a massive extinction, diverse marsupials came to dominate this isolated continent.
Now in its 40th season, NOVA is the most-watched primetime science series on American television, reaching an average of five million viewers weekly.
What is the chance a new flu strain will jump from birds to people?
NOVA explores headline-grabbing innovations and discoveries from our past, present and future.
Now in its 39th season, NOVA is the most-watched primetime science series on American television, reaching an average of five million viewers weekly.
Gross Science: How bed bugs reproduce is the stuff of nightmares.
An ancient Greek computer could predict eclipses with impressive accuracy.
David Pogue learns about rare earth elements.
The basic building blocks for life are made of just six elements.
Airs Wednesday, November 23, 2011 at 10:00 p.m. ET/PT. Check your local listings.