Results tagged “what if?”

What would the world be like without us? In this video, Neil takes you through a scenario. What do you wonder about? Add your "What If" scenarios here,and the producers of NOVA scienceNOW might have Neil act out the answers.

What if you could fall through the Earth? In this video, Neil takes you on a fantastic voyage through Earth's molten core--without getting burned. What do you wonder about? Add your "What If" scenarios here, and the producers of NOVA scienceNOW might have Neil act out the answers.