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Animals

Male butterflies are driven to drink

Monarch butterflies that winter in California, especially males that had a demanding day, search out dewdrops as a water source.

Earth

Cigarette smoke can harm kitty, too

Compared with animals living in smokefree homes, cats who lived for some time with a smoker at least doubled their risk of developing the feline analog of the cancer non-Hodgkin's lymphoma.

Tech

Micromachine runs on nuclear power

Radioactivity creates electric fields that wiggle a tiny lever.

Math

Probabilities in Bingo

One of the little pleasures of our annual winter vacation is an evening Bingo party.