What if we didnt have mucus? The insides of our bodies would be very dry, and we would find it hard to digest our food. We would also quickly become sick, because mucus protects us from dirt in the air that we breathe. But what exactly is this sticky, slimy stuff we call mucus? What's it made of? Is it the same thing as snot? Why do we produce more of it when we have a cold? And what do animals like slugs and snails do with their mucus? You might...

Tells about the use of dogs for bomb detection and then describes their selection, training, and accomplishments.

On October 25, 2003, CIA Paramilitary Operative William "Chief" Carlson was on a dangerous mission in eastern Afghanistan. He and his team were tracking down terrorists in a rugged mountain area. Without warning, a bomb whizzed through the air, heading straight for their vehicle. Special Operative Carlson knew he had to take immediate action, but would he be able to save his men in time? In this gripping book, young readers will meet the CIA Paramilitary...

"Just when Tony is about to add his pizzazz to an international eco-summit in Ireland, someone close to him forces him to question his role in making the world a more dangerous place with his high-tech weaponry. But Stark doesn't have much time to reflect before an old enemy presents him with an even greater challenge: the assassination of all the eco-ministers, and Iron Man himself. Just how invincible Iron Man is when he is stripped of everything...

"Imagine microscopic worms living in the soil. They enter your body through your bare feet, travel to your intestines, and stay there for years sucking your blood like vampires. You feel exhausted. You get sick easily. It sounds like a nightmare, but that's what happened in the American South during the 1800s and early 1900s. Doctors never guessed that hookworms were making patients ill, but zoologist Charles Stiles knew better. Working with one of...

No grizzly has ever killed a human in Glacier National Park before... until tonight. Eleven-year-old Melody Vega and her family come to Glacier every year. Mel loves it here -- the beautiful landscapes and wildlife make it easy to forget her real-world troubles. But this year is different. With Mom gone, every moment in the park is a reminder of the past. Then Mel comes face-to-face with a mighty grizzly. She knows basic bear safety: Don't turn your...