Air pollution comes from many sources — power plants, industrial production and fires, to name a few. In Pittsburgh, the most polluted city east of California, according the American Lung Association, avoiding dirty air while outdoors can be difficult, if not impossible. But a new device, available through the public library system, helps people identify and reduce bad air quality insidetheir homes.
It looks like dogs might well have been man's (and woman's) best friend for a lot longer than once thought.
The long-held conventional wisdom is that canis lupus familiaris split from wolves 11,000 to 16,000 years ago and that the divergence was helped along by Stone Age humans who wanted a fellow hunter, a sentry and a companion.
Now, DNA evidence suggests that the split between dogs and their wild ancestors occurred closer to 30,000 years ago.
In recent years, expensive specialty medicines used to treat cancer and chronic illnesses have forced some very ill Americans to choose between getting proper treatment and paying their rent.
To ease the financial burden, the California agency that governs the state's Obamacare plans issued landmark rules Thursday that will put a lid on the amount anyone enrolled in one of those plans can be charged each month for high-end medicine.