Nature Mysteries

Learn how fossils teach us about dinosaurs.

La nueva perrita de Katie, Koko, se ha escapado, ¡y ahora la cachorrita blanca está perdida! Pedro y Katie unen fuerzas para investigar. Están sobre la pista de Koko, pero algunas de las pistas no llevan a ningún lado. Aun así, los detectives no se dan por vencidos. Después de todo, ¡resolver este misterio es la única manera de traer a Koko de vuelta a casa!

Humphrey has always investigated things, like why Speak-Up-Sayeh was so quiet and Tall-Paul and Small-Paul didn't get along, but this is a true mystery - Mrs. Brisbane is missing! She just didn't show up in Room 26 one morning and no one told Humphrey why. The class has a substitute teacher, called Mr. E., but he's no Mrs. Brisbane.

It's summertime, and the weather on Hank's West Texas ranch is hot and dry. So dry, in fact, that everyone is on the lookout for prairie fires. So Hank bravely adds the title of Head of Fire Safety to his already impressive list of responsibilities and gets to work. But patrolling for fires is dull, and it's hard to do on an empty stomach. Despite the distractions - desperate hunger, a cruel trick at the hands of Pete the Barncat - Hank somehow manages to stay focused on the job at hand.

In this shocking psychological thriller and follow-up to The Girls I've Been, four teens face off against a wicked man in a remote forest in a desperate fight for their survival. High school is over, but Nora O’Malley’s life isn’t, which is weird now that her murderous stepdad Raymond...

Sawyer Matthews is a retired and presumed-dead assassin. Ripped from her life of shadows and secrets, she's decided to gamble it all and accept a new chapter in her life - one that may lead to a brighter future. With her first case over and budding relationships with some of her teammates, Sawyer finds herself feeling more secure. Sawyer's found a place on the team, and wants to keep it, no matter the struggles that come from it. It should have been a standard, mundane trip to New York, and the base of operations for the IMPO and the WMC.

Sometimes a mouse just has to bust out and do something big. That's why Marvin (also known as "Merciless Marvin the Magnificent") decides it's time to lead Raymond the Rat and Fats the Fuse out of their cozy lair at the back of the movie theater and on to greater glory. Enough of stale popcorn and left over candy! It's time to go in search of...cheese!

It's the weekend—a perfect day for a sail off the coast of Maine. But there's something fishy going on with the local dolphins and Abbi, Lydia, and Daniel are determined to find out why. Are the dolphins twisting, leaping, and whistling because they're playing? Or is it a warning of nearby danger? And if it's danger, how can the kids get grownups to believe them? Abbi and her friends are diving head first into this mystery!

Bowser the dog is doing great. He's been adopted by Birdie, the greatest girl in the world, and he gets lots of love, lots of walks, and sometimes even bacon! But why is Birdie looking so worried? Who broke into their house? Why is the new girl in town digging into the old mystery of what really happened to Birdie's dad, a policeman killed in the line of duty? Bowser better keep his ears perked and his paws at the ready. A murder case that went cold long ago is fixing to get way too hot.

It all starts with Hank the puppy enjoying his family's backyard home. Feathers start to fly when Hank defends his backyard against invading...phantom ducks? Hank's mother says it's a good time for him to go out on his own before the dogcatcher arrives. So Hank makes his way to the Twitchell Livestock Auction. Will he join up with Slim, the cowboy he meets there? Or will the dogcatcher provide his new home?

A riveting blend of science writing and true-crime narrative, The Nature of Life and Death details Wiltshire's unique journey from college professor to crime fighter: solving murders, locating corpses, and exonerating the falsely accused. Along the way, she introduces us to the unseen world all around us and underneath our feet: plants, animals, pollen, spores, fungi, and microbes that we move through every day. Her story is a testament to the power of persistence and reveals how our relationship with the vast natural world reaches far deeper than we might think.

Walter's family is holding a yard sale, but there are few customers. Walter, farting contentedly near Father, wonders why. When a man offers ten dollars for Walter, Father readily agrees. Walter wonders why. Walter is sad to leave his family behind but relieved to discover that his new owner is a clown. Walter figures he will help the clown bring joy to children on their birthdays. But the clown has a dastardly plot: He will use Walter's gas to inflate balloons and then pop them to stun guards during bank robberies. Will Walter turn to the dark side? Of course not! He comes out a hero and is reunited with his family by doing what he does best.

Meet Tyrone the Tyrannosaurus, Green Lawn’s newest–and biggest!–visitor. The kids’ old friend Jud Wheat is in town raising funds for a dinosaur museum. But after the show in Green Lawn, all Jud’s money disappears! Can Dink, Josh, and Ruth Rose track down the cash?

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.

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?

Lost: one little boy. When Little Alfred runs away from home and winds up in the Dark Unchanted Forest being trailed by a bobcat, Hank the Cowdog knows that it's up to him to save his young master. So, mustering up all the courage that a Head of Ranch Security can come up with, he bravely makes his way into the forest.

Cats are disappearing and Sammy is finding some of them in neighborhood garbage cans - dead! Miss Kitty, a local psycho cat lady, blames Sammy. Meanwhile, there's something fishy going on with one of the students from Slammin' Dave's Pro Wrestling School that just opened up next door to Sammy's friend Holly.

Inspector Hopper is a detective with a feel - and feelers - for mysteries. With the help of his partner, McBugg, this tiny supersleuth can crack any case!

A girl emerges from the woods, starved, ill, and alone...and collapses. Suzanne Blakemore hurtles along the Blue Ridge Parkway, away from her overscheduled and completely normal life, and encounters the girl. As Suzanne rushes her to the hospital, she never imagines how the encounter will change her - a change she both fears and desperately needs. Suzanne has the perfect house, a successful husband, and a thriving family.

It's winter in the Texas Panhandle, and the ranch is covered in snow and ice. So when Sally May sets off for town, Hank decides to follow Pete the Barncat's advice and bravely escorts her car down the slick road. Before Hank realizes what's happening, Sally May's car skids into a snowdrift - and she is angrier than ever!