Can menopausal killer whales have it all?

A new study sheds light on the important evolutionary role of older female killer whales.

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    Widening superbug outbreak raises questions for FDA, manufacturers

    Widening superbug outbreak raises questions for FDA, manufacturers

    Sometimes-deadly infections traced back to the care of a device used to treat problems in the digestive tract.

    More about that doctor shortage, er, poor distribution of physicians

    More about that doctor shortage, er, poor distribution of physicians

    Critics say we have enough doctors if they were located in the right places and practicing in fields that match patient needs.

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    The dirt on duodenoscopes

    The dirt on duodenoscopes

    A device used to diagnose and treat problems with pancreatic and bile ducts has been implicated in a number of antibiotic-resistant bacterial infections.

    New paint makes crazy waterproof surfaces (and gorgeous artwork)

    New paint makes crazy waterproof surfaces (and gorgeous artwork)

    Waterproof coatings are great: They keep your stuff dry. But let’s talk about what’s really important, here. Isn’t this water-based art gorgeous?

    How a star 9 billion light years away explodes four times, in four places

    How a star 9 billion light years away explodes four times, in four places

    A warp in space time gave one supernova more than one chance to shine.

    Data: Mars once had a sea larger than Arctic Ocean

    Data: Mars once had a sea larger than Arctic Ocean

    Using telescopes on Earth, scientists have looked back 4.5 billion years into Mars’s past.

    Video reveals the incredible acrobatic feats (and occasional face plants) of a pouncing praying mantis

    Video reveals the incredible acrobatic feats (and occasional face plants) of a pouncing praying mantis

    Sometimes doing science means watching one of the most graceful insects in the world face plant over and over again.

    Recruiting retired physicians to help solve a looming doctor shortage

    Surgeons who have suffered disabilities and others are retraining to provide primary care

    The rate of heroin overdose deaths has nearly tripled in just three years

    The rate of heroin overdose deaths has nearly tripled in just three years

    The most common victim is now white and younger, instead of black and middle-aged.

    WHO to basically everybody: Stop eating so much sugar

    WHO to basically everybody: Stop eating so much sugar

    WHO recommends less added sugar intake worldwide.

    Coffee may not be bad for you but the jury’s still out about if it’s good for you

    Coffee may not be bad for you but the jury’s still out about if it’s good for you

    Brewed coffee may always be a source of insomnia, irritability, acid reflux and other side effects.

    Photos

    Best of underwater photography: Hidden caverns, whaleshark frenzy

    Best of underwater photography: Hidden caverns, whaleshark frenzy

    A look at the winning images and what the people behind the camera had to say about them.

    The octopus that figured out how to work a camera

    The octopus that figured out how to work a camera

    A filmmaker tried to take pictures of an octopus under water. The octopus had other plans.

    Scientists work out the weight of a famous Stegosaurus

    Scientists work out the weight of a famous Stegosaurus

    Archaeologists wish they could be so rude as to walk up and ask a dinosaur her weight. Traditionally, they’ve guessed the mass of the long-dead dinos by making estimates based on the size of the bones in their thighs and upper arms. That’s proved to be as accurate as they can get -- until now.

    Curiosity rover on Mars benched after a short circuit

    Curiosity rover on Mars benched after a short circuit

    No more selfies for Curiosity -- for now, at least. The famous little Mars rover is taking a few days off after a short circuit on Feb. 27 set off its fault-protection procedures.

    Twenty-eight countries have worse health care systems than Liberia’s

    Twenty-eight countries have worse health care systems than Liberia’s

    By some measures, health care in the Ebola-ravaged nation is not nearly as fragile as it is elsewhere in the developing world.

    U.S. faces 90,000 doctor shortage by 2025, medical school association warns

    U.S. faces 90,000 doctor shortage by 2025, medical school association warns

    As the nation’s population ages, more specialists will be needed to treat chronic diseases of the elderly, the association says.

    A paralyzed woman flew an F-35 fighter jet in a simulator — using only her mind

    A paralyzed woman flew an F-35 fighter jet in a simulator — using only her mind

    A 55-year old Pittsburgh woman has successfully controlled a prosthetic arm -- and now a Joint Strike Fighter aircraft -- with just her thoughts.

    How astronaut Chris Hadfield’s priceless flight suit ended up selling for 40 bucks at a thrift store

    How astronaut Chris Hadfield’s priceless flight suit ended up selling for 40 bucks at a thrift store

    Apparently there might be a whole box of space memorabilia just floating around Toronto.

    150,000 of these bacteria could fit on the tip of a hair (and that’s about as small as life can get)

    150,000 of these bacteria could fit on the tip of a hair (and that’s about as small as life can get)

    Found in groundwater, these bacteria might represent the very smallest that life on our planet can get.

    Mystery paralysis in children is perplexing parents — and researchers

    Mystery paralysis in children is perplexing parents — and researchers

    Doctors think the polio-like cases may be connected to last year’s outbreak of enterovirus D68.

    We crave that sweet taste — but at what cost?

    We crave that sweet taste — but at what cost?

    Scientists debate the effects of natural sugars vs. the artificial versions.

    Graphic

    Sweeteners: A periodic table

    Sweeteners: A periodic table

    A survey of sweeteners

    Ice caves on Lake Superior are currently the only thing we like about ice

    Ice caves on Lake Superior are currently the only thing we like about ice

    Except ice hockey. We still like ice hockey. Well, some of us do.

    Rich and poor have very different views on the causes of health problems

    Rich and poor have very different views on the causes of health problems

    A new survey illustrates a socioeconomic dividing line among Americans on health care.

    Zip from the Amazon rain forest’s canopy to the forest floor with Google Street View

    Zip from the Amazon rain forest’s canopy to the forest floor with Google Street View

    Google’s Street View now maps out a trip on a zipline between the forest floor and the canopy of the Amazon rainforest.

    Heavy drinking is not the only cause of serious liver trouble

    Heavy drinking is not the only cause of serious liver trouble

    Overweight, obese or have Type 2 diabetes? You should learn about nonalcoholic fatty liver disease.

    Her mother seemed to have classic dementia. Or did she?

    Her mother seemed to have classic dementia. Or did she?

    She had trouble walking and became very passive.The correct diagnosis, and cure, took 10 years.

    Vegetables’ nutritional value can rise with cooking

    Vegetables’ nutritional value can rise with cooking

    Eating produce in its raw form may deprive you of important minerals and antioxidants.

    Five of the most famous scientific hoaxes

    Five of the most famous scientific hoaxes

    Fake fossils, ancient pottery shards, phony physics data and a huge mummified man among them.

    If you don’t have health insurance, you may have to pay a penalty

    If you don’t have health insurance, you may have to pay a penalty

    A special enrollment period opens March 15 for those who discover the fee while preparing their taxes.

    Nothing like a fried tarantula for dinner

    Nothing like a fried tarantula for dinner

    Cambodians hunt them for medicine and food, but deforestation threatens the tradition.

    NASA’s historic Dawn mission set to reach the mysterious Ceres on Friday

    NASA’s historic Dawn mission set to reach the mysterious Ceres on Friday

    The Dawn spacecraft is set to give NASA two firsts on Friday March 6: The spacecraft, which launched over seven years ago, will be the first to orbit two alien objects during the course of its mission. And when it makes it to its second destination at the end of the week, it will also be the first spacecraft to investigate a dwarf planet.

    A NASA video shows how dust leaves the Sahara and floats to Amazon forest

    A NASA video shows how dust leaves the Sahara and floats to Amazon forest

    Now that scientists know more about the process, they’re hoping to understand its effect on the climate.

    Grow your own dress

    By turning bovine cells into a cowhide-like material, a designer combines biotech and fashion.

    One of the youngest, most distant galaxies ever observed is surprisingly mature (and dusty)

    One of the youngest, most distant galaxies ever observed is surprisingly mature (and dusty)

    Astronomers have spotted a galaxy so distant that we can observe it as it was near the dawn of time.

    Half of adults will get chronic kidney disease, model predicts

    Half of adults will get chronic kidney disease, model predicts

    Awareness is slow for a serious condition that develops as we age.

    Only three lucky groups of emperor penguins survived the last ice age

    Only three lucky groups of emperor penguins survived the last ice age

    A new genetic analysis of emperor penguins suggests that even the kings of the cold can get too chilly for their own good.

    Do we really want to know if we’re not alone in the universe?

    Do we really want to know if we’re not alone in the universe?

    Researchers want to try to contact newly discovered planets. But some worry about the response.

    At least 6 Republican states revisit their stance of resisting Obamacare

    At least 6 Republican states revisit their stance of resisting Obamacare

    They fret over a possible court decision that would revoke subsidies for millions of Americans.