Introduction to Mental Accounting

Extras

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  Mammal Fossils Fill in Missing Piece of the Timeline of Life

  This trove of mammal fossils paints a timeline of life after the dinosaurs died.

  3:35
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  Paleontologist Makes "Game-Changing" Fossil Discovery

  The Denver Basin preserves a pristine record of ecosystem recovery.

  1:34
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  Paleontologists Discover New Mammal Fossils Hidden in Rocks

  Stunning new mammal fossils were hiding in plain sight.

  5:44
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  How Voyager discovered that Neptune is oddly warm and stormy

  Neptune has swirling clouds and strong winds. Can scientists figure out why?

  1:58
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  The Cassini Spacecraft's final moments

  Cassini plunges into Saturn, marking the end of its 13-year mission.

  2:16
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  Jupiter, the First Planet to Form in our Solar System

  Jupiter formed long before most other planets around it did.

  1:42
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  Mars, the Red Planet, Was Once Blue

  Mars once had rains, rivers, and in the northern hemisphere, a vast sea.

  1:25
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  Behind the Scenes: The Making of "The Planets"

  See the work that went into creating some of the animations in "The Planets."

  4:26
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  Inside Look: "The Planets"

  PBS journeys through the solar system to explore NOVA’s “The Planets.”

  1:30
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  Scientists Launch Rocket into the Moon to Find Water

  Researchers hope to observe lunar material ejected from an impact.

  4:35