Dan was a writer on CNET's How-To and Thought Leadership teams. His byline has appeared in The New York Times, Newsweek, NBC News, Architectural Digest and elsewhere. He is a crossword junkie and is ...

Sharks play crucial roles in marine ecosystems. As predators, they loom large at the top of many marine food chains and help maintain a certain balance. Unfortunately, many shark species are declining ...

Actually, it's a one in three chance that the pet food you are giving to your dog or cat includes protein from endangered sharks, according to a new Yale study. The study, published in February in ...

The second most common species the researchers identified was the silky shark, a vulnerable species that is in decline worldwide. Stephen Frink via Getty Images The next time you buy cat food from the ...