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Science

Wood frogs’ No. 1 option: Hold in pee all winter to survive

WASHINGTON — If you’ve ever been unable to find a bathroom in a moment of need, you know the gotta-go feeling. That’s nothing compared to the wood frog, which doesn’t urinate all winter.

In Alaska, wood frogs go eight months without peeing. And scientists have now figured out how they do it, or more accurately, how they survive without doing it.

America’s air isn’t getting cleaner as fast as it used to

DENVER — For decades America’s air was getting cleaner as levels of a key smog ingredient steadily dropped. That changed about seven years ago when pollution reductions levelled off, a new study found.

This means when tighter federal air quality standards go into effect later this year, many more cities may find themselves on the dirty air list.

California tortoise with cracked shell gets $4,000 repair

SAN DIEGO — A wayward tortoise that cracked its shell after falling off a 10-foot wall in California is recovering after vets used screws, zip ties and denture material to repair it.

San Diego County Animal Services Director Dan DeSousa says the male 90-pound African spurred tortoise probably was a pet that got loose from a yard.

Parenting of the future: Many embryos, each with DNA profile

NEW YORK — So you want to have a baby.

Would you like a dark-haired girl with a high risk of someday getting colon cancer, but a good chance of above-average music ability?

Or would you prefer a girl with a good prospect for high SAT scores and a good shot at being athletic, but who also is likely to run an above-average risk of bipolar disorder and lupus as an adult?