Pain is a complicated experience. Our skin and muscles sense it, just like they sense softness or warmth. But unlike other sensations, the experience of pain is distinctly unpleasant.

Pain has to hurt for us to pay attention to it, and avoid hurting ourselves further.

But for people in chronic pain, the pain has largely lost its purpose. It just hurts.

While is has long been understood how nerves signal pain to the brain, scientists haven't known how the brain adds a layer of unpleasantness.

For nearly a year before family separation became an official and controversial policy of the Trump administration in the spring of 2018, federal immigration agents separated "thousands" of migrant children from their parents. That's according to a government watchdog report released Thursday.

Jilmar Ramos-Gomez served in the Marines and saw combat in Afghanistan. Born in Grand Rapids, Mich., he is a U.S. citizen.

But last month, federal immigration authorities took him into custody to face possible deportation.

Attorneys and immigration advocates in West Michigan are now demanding to know why, and how, that happened.

President Trump's former personal attorney Michael Cohen acknowledged on Thursday that he schemed to rig online polls that sought to make Trump seem like a more plausible presidential candidate.

The story was first reported by The Wall Street Journal. In a tweet following the report, Cohen said he sought to help Trump's political aspirations, having been directed by the candidate.

Two-year-old Julen Rosello was with family members on a rural property in southern Spain on Sunday when he is thought to have fallen down a hole more than 300 feet deep.

"I heard my son crying, and 30 seconds later I couldn't hear him anymore," the boy's father, José, told Spanish media. However, Julen has not been heard from since.

Much-loved poet Mary Oliver died Thursday of lymphoma, at her home in Florida. She was 83. Oliver won many awards for her poems, which often explore the link between nature and the spiritual world; she also won a legion of loyal readers who found both solace and joy in her work.

Gas is relatively cheap these days. Enjoy those low prices, but don't get used to them, analysts say.

An oversupply of oil on the world market has triggered a steady slide in gas prices, bringing Americans some of the cheapest gas in years as 2019 kicked off.

Nationally, regular was averaging around $2.25 per gallon at the start of January — the lowest price for this time of year since 2016, according to AAA.

It's welcome news for drivers. Just last summer, gas prices were at four-year highs.