An expert describes the carbon composition of diamonds, as well as the conditions necessary for diamond formation in this video segment from Nature.

In this video segment from Nature, learn about six different breeds of cattle.

In this segment from Curious, learn about creating energy from solar rays to meet the growing energy needs of the world.

The CyberSquad tracks Digital position in time and then studies graphs to figure out what Hacker is scheming in this video from Cyberchase.

Using circumference, this segment measures the total distant traveled by two carousel riders after the carousel has rotated 10 times.

In this Cyberchase video segment, the CyberSquad figures out how to earn 100 snelfus in 11 days.

The CyberSquad must construct a clock of sorts in order to keep track of the amount of time they have to rescue Dr. Marbles in this video segment from Cyberchase.

In this video segment from Religion & Ethics Newsweekly, learn how Muslims in America celebrate Eid al-Fitr, the Ű_í_Ű__Ű_ŒŰ_ŒŒŰ‹_Feast of Breaking the Fast.Ű_í_Ű__Ű_ŒŰ_ŒŰ_í_Ű_Œ

This video, adapted from NASA, presents rare experimental evidence from the Fermi Gamma-ray Space Telescope supporting Einstein's prediction that space-time is smooth.

Franklin works with Laverne to create a budget for a job painting a room, in this video segment from TV 411.

Harry estimates how long it will take him to get to the front of a long ticket line in this Cyberchase video segment.

In this NASA video, scientists describe how the Extreme Ultraviolet Variability Experiment will sample and track the Sun's ultraviolet irradiance, providing a detailed time sequence of extreme ultraviolet output -- data that can provide advance warning for potentially disruptive energy bursts.

In this video segment from Religion & Ethics Newsweekly, learn about Muslims in Lawrenceville, Georgia, their plans to build an Islamic cemetery and the stiff objections from their Christian neighbors.

The CyberSquad tests which broom can travel the furthest in five seconds in this video from Cyberchase.

The CyberSquad solves the problem of giving equal parts of two apples to Cerberus, the three headed dog of Greek mythology, in this video from Cyberchase.

In this video from Nature, watch how ravensŰ__Ű__ŒŒÇ smarts can be observed in many situations, such as when they hunt and store food.

In this video segment from Cyberchase, through addition and regrouping in base sixty, Matt helps Digit figure out what time his CyberSoufflŰ__ŒŰÖ will be done.

The CyberSquad reviews their budget for the second day of their film shoot in this video from Cyberchase.

In this video segment from Cyberchase, the CyberSquad compares their budget with their actual spending from day three of their film shoot.