Tooth enamel is the hardest substance in the human body, but, until now, no one knew how it managed to last a lifetime. The authors of a recent study conclude that enamel's secret lies in the imperfect alignment of crystals. Using new imaging technology, scientists have unlocked the secrets of enamel.

If we cut our skin or break a bone, these tissues will repair themselves; our bodies are excellent at recovering from injury.

Read more at Medical News Today.

Apple's top executives showed their support of DACA recipients in an unprecendented way as the Supreme Courts gets ready to decide the fate of the Deferred Action for Childhood Arrivals program.

Read more at NBC News.

How do I deal with difficult coworkers? I’ve moved to a different department at my company and am working with new people. I feel like they don’t like me, though I’ve tried my best. I don’t need them to be my friends, but it would make work more pleasant if we got along. What can I do?

Dealing with difficult co-workers can be challenging and tricky to navigate, but as my friend likes to say, everything is “figure-out-able.” So let’s dig in and look at the steps you can take to crack the code and build more positive working relationships.

Read more at Marie Claire.

To most of us, the idea of starting a business means that we will need a bunch of our own money to get things off the ground. But what if you have a great idea for a business, the talent and skills to make it work, but you have little or no money to get the business off the ground? Is the idea of starting this business dead in the water? Not necessarily. Here are some ideas about starting a business with little or no money of your own. 

Read more at The Street.

Making money while you sleep has a beautiful ring to it. I mean, who wouldn’t want to be making some extra money while playing with the kids or while watching a game? The only problem is that most ‘passive’ income…

The only problem is that most ‘passive’ income ideas that you’ll come across are not passive at all. Since you’re already busy with your everyday life, you won’t want to pick up a 2nd job that you don’t have time for.

Read more at The Ladders.

This week, the personal-finance publication Kiplinger’s released its list of the most — and least — tax-friendly states in America. To draw its conclusions, it used a hypothetical couple with two kids and $150,000 in income a year plus $10,000 in dividend income, and then looked at the income-, property- and sales-tax burden that family would face.

Illinois took the No. 1 spot on the list, thanks in large part to its high property taxes. The Land of Lincoln was followed by Connecticut and New York, both of which have pretty high-income taxes.

Read more at Market Watch.

A new poll released Wednesday shows for the first time that more voters support than oppose beginning impeachment proceedings against President Donald Trump.

A new Politico/Morning Consult poll found that 46% of registered voters believe that Congress should start proceedings, while 43% are opposed and 11% have no opinion. That's a 3-point increase from last week's poll, which found that respondents were split.

Read more at US News.

Filling out the Free Application for Federal Student Aid, or FAFSA, is one of the most important steps students and their families can take to pay for college. In recent years, some states have even made completing the FAFSA a high school graduation requirement.

The U.S. Department of Education awards more than $122.4 billion in federal grants, loans and work-study funds, according to the most recent Federal Student Aid annual report. The agency reports that federal funds assist nearly 13 million students in completing their education.

Read more at US News.

House Democrats announced Wednesday that they will subpoena the Trump administration for documents related to Ukraine by the end of the week in an escalation of Democrats' impeachment inquiry into President Donald Trump.

Read more at US News.

A man who was gored by a bison in June took a date back to the same place - only for her also to be attacked.

Kyler Bourgeous brought Kayleigh Davis to the same trail at a state park in Utah with plans to watch the sunset.

Read more at BBC News.