Pennsylvania has hundreds of small dams that don't provide drinking water or flood control, so the state and conservation groups have been making a big push to remove them.
When 412 Food Rescue noticed a lot of smaller food donations were slipping through the cracks, they designed an app that makes it easy for volunteers to pitch in.
It does seem impossible that somebody is separating paper receipts from soda cans. But we can assure you, your recycling is getting sorted. And the whole system is pretty high-tech.
That fleet of Google Street View cars you see roaming Pittsburgh isn't just collecting images for Google Maps. Some cars are actually helping detect natural gas leaks under the city's streets.
Threats from pests, pesticides, diseases and habitat loss are all putting bees in a tough spot. But researchers have some new ideas for using technology to get bees back on track.
