Before they were the Boxcar Children, Henry, Jessie, Violet, and Benny Alden lived with their parents on Fair Meadow Farm. Although times are hard, the Aldens are happy - “the best family of all,” Mama likes to say. One day, a blizzard hits the countryside, and a traveling family needs shelter. The Aldens take them in, and the strangers soon become friends. But things never stay the same at the farm, and the spring and summer bring events that will forever change their lives.

Ryland Grace is the sole survivor on a desperate, last-chance mission - and if he fails, humanity and the Earth itself will perish. Except that right now, he doesn't know that. He can't even remember his own name, let alone the nature of his assignment or how to complete it. All he knows is that he's been asleep for a very, very long time. And he's just been awakened to find himself millions of miles from home, with nothing but two corpses for company.

A catastrophic event renders the earth a ticking time bomb. In a feverish race against the inevitable, nations around the globe band together to devise an ambitious plan to ensure the survival of humanity far beyond our atmosphere, in outer space.

In the Nevada desert, an experiment has gone horribly wrong. A cloud of nanoparticles (micro-robots) has escaped from the laboratory. This cloud is self-sustaining and self-reproducing. It is intelligent and learns from experience. For all practical purposes, it is alive. It has been programmed as a predator. It is evolving swiftly, becoming more deadly with each passing hour. Every attempt to destroy it has failed. And we are the prey.

Cities all around the world reported strange alien vessels descending. Some saw them as the heralds of a new age; others fired everything they had at them. All were taken as the beams lashed down and drew them into the sky. Dean was left behind, seemingly the last man on Earth. A trail of clues left by his dead wife guides Dean on a perilous journey across America and beyond to learn the truth behind the mysterious ships and save humanity from its doom.

Fraa Erasmus is a young avout living in the Concent of Saunt Edhar, a sanctuary for mathematicians, scientists, and philosophers, protected from the corrupting influences of the "Saecular" world by ancient stone, honored traditions, and complex rituals. Over the centuries, cities, and governments have risen and fallen beyond the concent's walls. Three times during history's darkest epochs, bloody violence born of superstition and ignorance has invaded and devastated the cloistered mathic community.

When 11-year-old Stella Rodriguez shows up at NASA to request that her recording be included in Carl Sagan's Golden Record, something unexpected happens: A black hole follows her home and sets out to live in her house as a pet. The black hole swallows everything he touches, which is challenging, to say the least - but also turns out to be a convenient way to get rid of those items that Stella doesn't want around.

Cruz Coronado leaves his tranquil home in Hawaii to join 23 talented kids from around the globe to train at the Explorer Academy with the world's leading scientists to become the next generation of great explorers. But for Cruz, there's more at stake. No sooner has he arrived at the Academy than he discovers that his family has a mysterious past with the organization that could jeopardize his future. In the midst of codebreaking and cool classes, new friends, and augmented reality expeditions, Cruz must tackle the biggest question of all: Who is out to get him, and why?

On February 29th, at 4:23 p.m., everyone in the Bailey family over the age of twelve gets a superpower. No one knows why, and no one questions it. All the Baileys know is that it's their duty to protect the world from those evil, supervillainous Johnsons. Today, Rafter Bailey and his brother Benny are finally going to get their superpowers. Benny wants to be a speedy, and Rafter hopes he gets his grandpa's super strength so he can save the day just like him. But when their powers arrive, they are - well - duds.

In this series opener, listeners meet Jack and his foster siblings, Ava and Matt, who are orphans. But they're not your typical kind of orphans - they're geniuses. Well, Ava and Matt are, which sometimes makes life difficult for 12-year-old Jack. Ava speaks multiple languages and builds robots for fun, and Matt is into astronomy and a whiz at math. As for Jack, it's hard to stand out when he's surrounded by geniuses all the time.

The Whippet Hotel is a strange place full of strange and mysterious people. Each floor has its own quirks and secrets. Leo should know most of them - he is the maintenance man's son, after all. But a whole lot more mystery gets thrown his way when a series of cryptic boxes are left for him... boxes that lead him to hidden floors, strange puzzles, and unexpected alliances. Leo had better be quick on his feet, because the fate of the building he loves is at stake... and so is Leo's own future!

Ollie and Celia think they know what the life of an elf is supposed to be like: Make toys. Help Santa. Make more toys. Help Santa. Try out a new ice-cream flavor. Help Santa. But then Santa rocks the North Pole with a surprise announcement! He's decided this is going to be his last year in the Big Red Suit, and, instead of letting his oldest son - the unfortunately named Klaus Claus - take over, he's opening up the job to any Claus or elf who wants to apply.

Paleontologist Brandon Thackery and his rival, Miles "Klicks" Jordan, fulfill a dinosaur lover's dream with history's first time-travel jaunt to the late Mesozoic. Hoping to solve the extinction mystery, they find Earth's gravity is only half its 21st-century value and dinosaurs that behave very strangely. Could the slimy blue creatures from Mars have something to do with both?

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?

There’s no doubt about it: These kids are nerds. Awkward, unpopular, uncool as uncool can be—and yet, there’s something about these “nerds” that nobody else knows. These dweebs are actually superspies who use their dorky skills to battle the evil Hyena and other villainous baddies.