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Cow uses tool to scratch, surprising scientists

Dating back to the dawn of civilization, humans have been one of the only creatures on Earth that use multi-purpose tools. Now, there's a new animal in the club. "CBS Evening News" anchor Tony Dokoupil has the story.

Jan 21 (01:25)

Former Cornell students ask school to clear names

Former Cornell students ask school to clear names

Yellow labs make first leaf pile jump of fall

Yellow labs make first leaf pile jump of fall

7th person arrested over UK airbase incident

7th person arrested over UK airbase incident

Video shows deadly Florida school bus crash

Video shows deadly Florida school bus crash

Paramount-Warner merger: What to expect

Paramount-Warner merger: What to expect

Arrest of California couple in surrogacy scandal

Arrest of California couple in surrogacy scandal

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Video shows cheerleader shoved by police

Cornell taps former DOJ official for review

Cornell taps former DOJ official for review

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Thousands protest budget cuts in France

New book examines Cuba, Hispanic culture in U.S.

New book examines Cuba, Hispanic culture in U.S.

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Gulf Coast under tropical storm threat

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Christa Pike conscious, speaking, lawyers say

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Couple in surrogacy scandal arrested

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Why Trump reversed course on his taxpayer-funded ads

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Potential tropical storm brewing in gulf

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Community still waiting for FEMA help after tornado

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Breaking down the latest midterm polls

Hamilton and Marshall neck and neck in Kansas

Hamilton and Marshall neck and neck in Kansas

Fallout from Trump comments on LA, San Diego

Fallout from Trump comments on LA, San Diego

How drones have changed modern warfare

How drones have changed modern warfare

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