They say every generation thinks it's the end of the world. But the Santa Cruz long-toed salamander has been staring at oblivion since 1967 That’s the year the amphibian was listed under the ...

Puzzles are a hands-on way to explore simpler and complex mathematical relationships, for everyone from kids to calculus students.

If you spot a small, long-tailed amphibian near a forested pond, you are likely looking at a salamander or a newt. But what's the difference between a salamander and a newt? And how do you tell them ...