Source: NPR: Krulwich on Science

Understand the recycling of molecules around the world and consider how the same molecules are inhaled and exhaled throughout time. Find out how many of the molecules from Julius Caesar's last breath move in and out of your lungs as you breathe.

Grade Level: 6-8, 9-12

Subjects: Science & Tech

Topics: Chemistry.

Resource Type: Audio

Source: NPR: Science Out of the Box

Discover what happens when you put ammonia and cyanide in a vial and freeze it for 25 years. Consider what chemists can deduce about the beginning of life on Earth from this experiment.

Grade Level: 6-8, 9-12

Subjects: Science & Tech

Topics: Chemistry. Evolution.

Resource Type: Audio

Source: NPR: Science Out of the Box

Ascertain when a sugar ceases to be a sugar by examining the arguments in the court battle between manufacturers of sugar substitutes. Discover whether the makers of Splenda sweetener have the right to their marketing claim that it is made from sugar.

Grade Level: 6-8, 9-12

Subjects: Reading & Language Arts, Science & Tech

Topics: Critical Thinking Skills. Media Studies. Chemistry.

Resource Type: Audio