The last time that these two groups of cicadas emerged from underground together, Thomas Jefferson was president.

High-quality bus service is the fastest route to rapid, comprehensive public transit in the United States. This country was once a leader in bus transit, and with adequate funding, it could be again.

Noxious smells and blowing ash initially made the homes unlivable. But even after their homes were cleaned, some residents still reported health effects months later.

When the Marshall Fire swept through the Boulder suburbs, scientists began studying the health effects. What they’re learning could help homeowners in the future.

When the Marshall Fire swept through the Boulder suburbs, scientists began studying the health effects. What they’re learning could help homeowners in the future.

When the Marshall Fire swept through the Boulder suburbs, scientists began studying the health effects. What they’re learning could help homeowners in the future.

When the Marshall Fire swept through the Boulder suburbs, scientists began studying the health effects. What they’re learning could help homeowners in the future.

When the Marshall Fire swept through the Boulder suburbs a year ago, scientists began studying the health effects. What they’re learning could help homeowners elsewhere in the future.

One of the largest groups of 17-year cicadas, Brood X, last emerged from underground in 2004. The next generation will arrive starting in April.

Wildfires aren't always wild. Many of the most expensive and damaging fires happen in suburban areas, and nearly all blazes in these zones are started by humans.