Exposure to cigarette smoke found to increase cancer risk in dogs

Dogs are humans' best friends. Need to quickly locate a bomb? There's a dog for that. Can't see very well? There's a dog for that. Searching for a lost hiker in the mountains or survivors in an earthquake, diagnosing illness, ...

Researchers identify molecular mechanism of cancer invasion

A cancerous tumor is the accumulation of cells uncontrollably dividing, some of which can invade other parts of the body. The process is difficult to predict in detail, and eradicating the cells poses even greater difficulty.

Vaquitas still exist, but barely: sea 'panda' survey

The vaquita, a small porpoise on the verge of extinction, is still hanging in there, said scientists Wednesday who had spotted about a dozen specimens of Mexico's "panda of the sea" on an expedition in May.

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