The Difference Between a Guard Dog and a Watch Dog

In addition to providing companionship, (some) dogs are also hard workers. For example, some breeds are excellent at herding sheep or cattle, while others use their heightened sense of smell to sniff out drugs or diseases.

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The Complex Social Lives of Viruses

New research has uncovered a social world full of cheating, cooperation, and other intrigues, suggesting that viruses make sense only as mem...