Federal researchers are collecting blood samples from 1 million Americans as part of an effort called "precision medicine." But some critics worry that the path ahead is expensive and unclear.
This year will go down in history for its extreme weather. Researchers have now definitively attributed three major extreme weather events to climate change.
Author Peter Zheutlin says the number of stray dogs in the U.S. has "cascaded out of control." He makes the case for why people should adopt abandoned dogs.
The goal is to customize treatments for cancer and other diseases to a patient's own biology. But something as simple as failing to take care of tissue samples en route to the lab can derail that.