A trip to the beginning of time and back. That's what visitors to the Adler Planetarium will experience in a new, interactive history of the universe. We take you inside this incredible voyage.

Chicago's final two coal plants are closing. So why did the state quietly pass a bill allowing a new coal plant to open in the city? Paris Schutz has the story.

In Chicago, we see both extreme cold and extreme heat. We asked which one you prefer. We read what some of you had to say in Viewer Mail.

Today, the earth is at its farthest point away from the sun that it will be all year. But it sure doesn't feel like it. What can you do to stay safe during the heat wave? City officials and a doctor are here to give some potentially life-saving advice.

Rain levels are extremely low for this time of year. Ash-har Quraishi talks with Tom Skilling about how severe the Illinois drought is, and what to do about it.

We learn how to reduce landfill waste through the everyday art of composting.

The author of a new book tells us how to keep kids safe in the digital age.

A rock from the fireball that caused a sonic boom as it fell in Nevada last month will join the Field Museum's meteorite collection on Tuesday.