The researchers say it's still not possible to quantify the exact risk of cancer caused by these products, however.

• Ed Cara
• Gizmodo.com

Three manageable tweaks to behavior could have an outsize influence on how long and well we live, a study involving tens of thousands of people shows.

• Gretchen Reynolds
• The Washington Post

When the topic of Lyme disease comes up, Robert F. Kennedy Jr. often tells a story about standing in a bathtub in Westchester County, New York, in the 1980s, picking almost 30 ticks off of himself after a day in the woods.

• Meg Tirrell
• CNN

Studies show that two to three cups of coffee or a cup or two of tea daily is linked to a lower risk of dementia and better brain health.

• Bill Murphy Jr.
• Inc.