Video: The limonene myth

Limonene, a compound found in citrus fruits, has two enantiomers: mirror-image molecules that cannot be superimposed, like a left and right hand.

Researchers hope a 'robo-nose' could give K-9 officers a break

Every day, thousands of trained K9 dogs sniff out narcotics, explosives and missing people across the United States. These dogs are invaluable for security, but they're also very expensive and they can get tired.

Chimpanzees sniff out strangers and family members

Chemical communication is widely used in the animal kingdom to convey social information. For example, animals use olfactory cues to recognize group or family members, or to choose genetically suitable mates. In contrast ...

Desert ants have an amazing odor memory

Scientists at the Max Planck Institute for Chemical Ecology used behavioral experiments to show that desert ants quickly learn many food odors and remember them for the rest of their lives. However, their memory for nest ...

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