Countries: CA

The Big Question: “Do dinosaurs eat people?”

Synopsis: Harrison sets out to explore why it is that some animals evolve to be big, while others evolve to be small. He is visited by a miniature horse and its foal who help him find out why animals are bred to be different sizes. Viewers are encouraged to test their own ability to make themselves seem as big as possible!

My Great Challenge: Challengers take part in a competitive (and tasty!) experiment to find out whether it’s an advantage for a predator to eat big or small prey (or to be big or small prey).

In the Field: Harrison takes a trip to the aquarium to visit some of the biggest animals of all – whales!

The Big Question: “Why does my hair stick to my chair?”

Synopsis: A physicist visits Harrison to explain how electricity is generated, and teaches us how it can be conserved. Viewers can take part in a fun experiment to see electricity at work in their own bodies.

My Great Challenge: Kids race to complete a circuit! But before they can do anything they must find a way to transfer power over a short distance, from a battery to a light bulb, by determining what materials conduct electricity.

In the Field: Harrison goes to the Sea Aquarium to visit a marine expert and some willing aquatic life to explore why electric eels don’t electrocute themselves and how sharks can detect our presence because of electricity!

The Big Question: “Can a horse and a pig communicate?”

Synopsis: Harrison is visited by a very special guest – a parrot – and he tries to figure out if he can understand what it’s saying! Meanwhile, viewers get to test out their ability to communicate with dogs. Harrison also discovers why humans speak so many different languages.

My Great Challenge: Kids use their hands to pantomime ideas in an effort to communicate like our distant ancestors.

In the Field: Harrison sets off to the Sea Aquarium to see if dolphins can understand sign language.

The Big Question: “Why will things change when you get older?”

Synopsis: An anthropologist and real-life expert in prehistoric tool-making teaches Harrison how to make Neanderthal knife blades and to paint like a “cave kid”. Harrison invites kids at home to join him in making simple machines – a wedge, an inclined plane, and a lever – using nothing more than a sheet of paper.

My Great Challenge: Contestants must figure out how to adjust a simple catapult in order to see who can throw a toy monkey the furthest.

In the Field: Harrison takes on an assembly line robot to see which of them can put a car together the fastest.

The Big Question: “Why do people hate the sound of fingernails on a chalkboard?”

Synopsis: Harrison is joined by rapper and musician Kid Koala, a special guest canine, and opera singer Lindsay Michael. Individually, these experts help us find out about the delicate mechanisms that help us hear. The special guest canine helps Harrison figure out whether dog whistles really are silent, and Lindsay Michael tests out whether a person can actually shatter a crystal glass with their voice. Viewers at home find out if they have bat-like hearing!

My Great Challenge: Kids must compete to see who can give our opera singer goose bumps by figuring out which material to scratch together to make the shriekiest sounds!

In the Field: Harrison travels to the sea aquarium and discovers that certain fish may use sound to communicate – by farting at each other!

The Big Question: “Are mosquitoes good for anything, or are they just annoying?”

Synopsis: Harrison visits an entomologist who explains to him how insects that eat insects can replace the poison farmers use to keep bad bugs away from their crops. Harrison is joined by a biologist who puts on a fascinating show and tell with all kinds of live bugs. He then puts school kids to the test by asking them to eat everyday products that most of us don’t realize contain…you guessed it…bugs! And viewers find out that a lot of household products are made using insects (everything from carpets to lipstick!).

My Great Challenge: Harrison sets up a faceoff between Team Bee and Team Butterfly to see who the best pollinator is!

In the Field: Our roving correspondent Sidney visits a food scientist and a chef who cook her up a tasty bug stir-fry!

The Big Question: “Why does the moon follow us?”

Synopsis: Harrison investigates intriguing facts about the moon, like why people think wolves howl at the moon (they don’t), whether the moon really turns people into werewolves, who the first men on the moon were and why the moon appears to follow us. Viewers at home test out their jumping skills as Harrison demonstrates where we’d be without gravity!

My Great Challenge: Using nothing more than a light, their wits, and funny headgear, challengers must figure out why the moon is sometimes full and why at times, it disappears!

In the Field: Harrison goes to…the Moon! Okay, maybe not the actual moon, but a simulated moonscape created by the Space Agency, where astronauts practice their extraterrestrial techniques and test out new equipment. There, a lunar geologist provides the answers to more kid questions, explaining how the Moon was formed and why there are craters.

The Big Question: “Why do bats sleep upside down?”

Synopsis: Harrison sets off on an investigation of such sleep phenomena as yawning, snoring, and sleepwalking. Along the way he shows kids how to make other people yawn and how to make it seem like they are fast asleep (with fake snoring!). Viewers get to find out what causes nightmares and how to make bad dreams go away.

My Great Challenge: The challengers must have slept in today….there is no great challenge in this episode.

In the Field: Harrison explores a sleep lab where he is hooked up to an EEG machine that monitors his brainwaves.

The Big Question: “What would happen if someone cracked the Earth?”

Synopsis: Harrison gets permission from his school to build a very large volcano and with the help of a real-life volcanologist he creates a grand finale in the form of one of the largest mentos and cola eruptions ever concocted on television! Viewers learn what to do if the earth starts shaking.

My Great Challenge: Oozing lava must have swallowed up the challengers today. There is no great challenge in this episode.

In the Field: Roving reporter Sidney visits an exhibition on volcanoes and earthquakes, and gets to make her own mini-earthquake. She meets an adventurer who goes down inside active volcanoes and gets a live demonstration of how his flame-proof suit works when one of his friends sprays him with liquid fire!

The Big Question: “Why can’t we fly?”

Synopsis: With the aid of a wind-tunnel and a four-time national radio-controlled airplane champ, Harrison takes to the school yard to discover why some things fly better than others and viewers find out what it really takes to leave the ground.

My Great Challenge: Challengers take part in a paper airplane experiment to see who can make the best wing.

In the Field: Harrison goes out into the field with a bird trainer to get a close up look at two of the best flyers in the animal world – an owl and a falcon.