Ben and Erin Napier's daughters have never used — or even held — a smartphone. As a result, they're "probably a little too judgmental" when they see other kids glued to screens.

When a piece of debris hits another object in space, it can also create more space debris, adding to the problem.

President Donald Trump spread some confusion about childhood vaccinations in social media posts about changes to U.S. vaccine recommendations. Trump’s administration on Monday took the unprecedented step of cutting the number of vaccines the government has long routinely recommended for all children. On that list are vaccines against 11 diseases.