Did you know sound moves five times faster in water than in air? Or that cleaner fish have "cleaning stations" where they remove parasites? Deepen your knowledge with this ocean life challenge. 

Hide your notes in seaweed, send a deep-sea snapshot, or let an cockeyed squid deliver your message. Just add your name and address to these colorful stationery files.

Most living things never become fossils. And most of the fossils created will never be found. Learn more about these extremely rare—and valuable—records of the past. 

Type your notes next to T. rex, send letters via Diatryma, or let Gondwanatitan deliver your message. Just add your name and address to these colorful stationery files. 

You don't have to be a professional paleontologist to collect the remains of ancient life. Anyone can find fossils. This handy how-to guide tells you where to look and what to do.

How much do you know about our watery world? Find out with this interactive quiz. Here's a hint to get you started: The greatest diversity of life on Earth is NOT found in your bathroom!

How much do you know about what it takes to dig up the past? Examine the details in each question closely to ace this interactive quiz on archaeology. 

Ornate jewelry, simple baskets, stone tools ... these are just some of the artifacts archaeologists have uncovered among ancient ruins. But one of the most common discoveries is pottery. 

Archaeologists are detectives who gather clues to the past. Discover the intriguing facts and artifacts that Chuck, Alexis, Ian, Jena, and Kellner have unearthed while following their curiosity.

Field journals are incredibly important to researchers. In fact, many can't imagine doing science without them. Learn how to create your own valuable journal.