Nature Mysteries

Learn how fossils teach us about dinosaurs.

Things are not looking good for the ranch. So when Loper heads into town to negotiate with the banker, Slim hits the road in search of a new home. Meanwhile, Hank and his faithful sidekick Drover hitch a ride in the back of Slim's pickup. Before long, they come to a stop in an unfamiliar town. And when Slim lands himself a new job, Hank finds that he's no longer the Head of Ranch Security, but the Head of Chicken House Security.

In the 1870s, grasshoppers known as Rocky Mountain locusts destroyed crops and farms across the Great Plains states, then were never seen again. Where did these bugs come from and where did they go? That's the great grasshopper mystery!

When the Aldens hear that Mr. Wood's cat Spotzie is missing, they immediately help out by putting up "LOST CAT" posters and going door-to-door with a photograph of the cat. But along the way, they meet some strange characters, receive frightening phone calls, and even find a cat that looks just like Spotzie - but is it? It seems that the more they search, the more mysterious the mystery becomes!

Avoided by the Coast Salish tribes for generations, Hurst Island is one of the last remnants of untracked wilderness on the British Columbia coastal frontier. Not yet overtaken by logging or commercial fishing, it is a final outpost where myth lives on, heedless of human progress or desire. As their boat sinks, Amy and Ian find themselves stranded on this island, unaware of what they are about to face.

There's a burglar on the loose, and he's robbing houses with the help of a supersneaky, super-stinky, secret weapon. When this character comes sniffing around Slim's bachelor shack, Hank the Cowdog heads right into action. But does Hank have what it takes to save the day even after getting caught in the spray of some very unsavory artillery?

Cattle call. A gang of marauding dogs is threatening the calf population on the ranch, and Hank knows that it's up to the Head of Ranch Security to do something about it. But instead of being outside where he can fight off the fiends, Hank is trapped inside - at the mercy of Slim and his dreaded vampire sweeper!

Arthur's friend Buster is searching for a crime to solve. So when the quarters Arthur has collected for Mrs. MacGrady's charity drive mysteriously disappear, Buster is committed to cracking the case. Will Buster be able to prove Arthur's innocence so that he can attend the class picnic?

Harold and Chester could hardly believe it. The Monroe family was going on vacation without them. Bunnicula, the family rabbit, would be boarded with a neighbor. But they, the family's loyal dog and cat, were to be sent away with strangers; they were to spend a week at Chateau Bow-Wow. Chateau Bow-Wow, observed Chester,soon after they arrived, could more properly be called Howliday Inn. Though what was howling, neither of them knew. Chester had his suspicions, however; only a werewolf could make that chilling sound.

Help solve the mystery with the detective dog, set sail on an exciting adventure in the flying bath and cook up a feast for a very fussy king! This collection includes stories from four of Julia's illustrator partnerships: David Roberts, Sara Ogilvie, Catherine Rayner and Rebecca Cobb.

It's the first day of quail season, and Plato the Bird Dog is missing. At first, Hank is willing to let him stay lost. But when Beulah pleads for help, Hank caves in and takes off in search of Plato. Before he can catch a scent of spotted bird-dog, he finds himself face-to-face with an angry mother hog and her litter. Can Hank's quick wits help him out of this fix? Or will he become hogmeat?

Legal investigator Finley O’Sullivan has had a difficult year in the wake of her husband’s murder. But in her line of work, there’s no time to grieve. Her job is to protect the firm’s clients and defend their innocence through grueling investigative work. Ellen Winthrop is a force to be reckoned with in the financial world. In a male-dominated industry, she shattered the glass ceiling by empowering and promoting women. But now her husband is dead, killed in the Winthrop family home—and she stands accused of his murder.

No sooner has Sally May finished planting her vegetable garden when some kind of unearthly being decides to burrow in the neatly planted rows of tomatoes and peppers. It looks like a job for the Head of Ranch Security, so Hank sets straight to work trying to dig the space monster robot out of its hole.

Judy Moody is in a mood. A sleuthing, Nancy Drew kind of mood. So what’s a WBMS (world’s best mystery solver) to do? Go find a mystery, that’s what! And she doesn’t have to snoop for long: when Mr. Chips, a beloved crime-dog-in-training, goes missing, Judy Drewdy and her chums, agents Dills Pickle (Frank), Spuds Houdini (Rocky), and James Madagascar (Stink) find themselves smack-dab in the middle of a real-life, scare-your-pants-off whodunit. Was Mr. Chips stolen by dirty dognappers? And why are chocolate-chip cookies disappearing all over town?

Hank the Cowdog and his trusty partner, Drover, are just beginning their latest investigation when a pirate suddenly appears on the front porch! Has the ranch really been set upon by one-legged men of the sea? Hank and Drover soon realize that the pirate is just Little Alfred in disguise.

Sometimes I take an opportunity to say good-bye to the cattle and wish them a safe journey. "Well, good-bye, you morons. It was nice having you here at the ranch, but it'll be even nicer having you gone. You ate all our grass and taking care of you was a pain in the neck. Good-bye, good riddance, and don't ever come back."

Walter the Cat is a star, but is he too famous for his own good? The Boxcar Children must find out who's trying to ruin this cat's career!

When Naomi gets a tip about a strange snake sighting in the neighborhood, she knows it’s a job for her snake-saving club. Naomi, Nolan, and Emma go to investigate and get a huge surprise. The snake isn’t a native Texas species—it’s a ball python! Did someone dump an unwanted pet, or did this snake somehow get lost?

These are the adventures and discoveries of the scientists who revealed the secrets of the Komodo dragon. This strange creature inspired myth and legend, luring brave souls into the forests of Indonesia to see if the tales were true. In the end, it attracted scientists, who unraveled the mysteries of how such a remarkable creature could exist, how it uses the deadly germs in its saliva to its advantage, and how those microbes may lead to cures for stubborn diseases.

It all starts with a school essay. Twelve-year-old Gratuity “Tip” Tucci is assigned to write five pages on “The True Meaning of Smekday” for the National Time Capsule contest, and she’s not sure where to begin: When her mom started telling everyone about the messages aliens were sending through a mole on the back of her neck? Maybe on Christmas Eve, when huge, bizarre spaceships descended to Earth, and aliens - called the Boov - abducted her mother?