Why learn about methane? Because it could be our chance to make a real dent in global warming, says environmentalist Fred Krupp.

In the United States, nearly 70 percent of the people held in local jails are there for one reason: they don’t have enough money to pay bail. Here’s a look at how this came to be and what it would take to change it.

You won’t see these amazing animals on a day at the beach, but they’re there — living in the vast, cold, unexplored midwater region of the ocean. Learn about six of its residents and how they’ve adapted to life in the dark.

Phil Hansen ended up using an amazing 52,901 dots to draw this portrait in a process that was anything but child’s play. On the way to setting a Guinness World Record, he had to solve many puzzles — and wrestle with some demons.

After hearing an idea that struck them at their core, these people were no longer satisfied to sit on the sidelines — so they jumped in.

You’ve probably used and discarded hundreds of pencils in your life so far. Put your knowledge to the test — and learn some cocktail party trivia in the process.

An inside look at the intense year-long investigation into the shady sales of the Trump Ocean Club high-rise in Panama