Identifying the difference between moss and algae is important because treatment approaches vary”— Thad Brown WISCONSIN ...

For decades, scientists have relied on tree rings to estimate how long trees can live. But new research suggests that this widely used method may have been underestimating the lifespan of many ...

But though an -itis can sound intense, there’s still no reason to be alarmed (or, again, to rub your eyes). To put your minds ...

Do the bones of all Nile crocodiles have the same number of growth marks as their age? And can such growth rings be counted to accurately gauge the age of these reptiles? Is this also an accurate ...

National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...