1 Back in time

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Chapter One BACK IN TIME. I love it when the museum is busy! thought Gustavo. All around him, people were admiring statues and peering into glass cases full of amazing objects from the past. He straightened his "Volunteer" armband. "Excuse me!" called a cheerful woman in a blue jacket. She pointed to a globe-shaped vase. It was black and decorated with cream

swirls. "Do you know how old this is?" she asked. "It's probably about a thousand years old," Gustavo replied. "It was made by the Marajoara people. They lived on an island at the end of the Amazon River, right here in Brazil." "That's really interesting," said the woman. "Thanks for your help!"

"No problem," said Gustavo with a grin. The museum was close to his Rio de Janeiro home, so he'd been coming as long as he could remember. He knew so much about the objects on display that he could answer any question the visitors asked! He loved history and enjoyed helping to care for the artifacts other civilizations had left behind. It would be amazing to go back in time, Gustavo thought, and see these objects being used by real ancient people! Out of the corner of his eye, he noticed a light shimmering. Gustavo's heart leaped. Could it be…? He turned around. On the elevator door was a glowing circle with the letters N, E, S and W. It was a compass! Gustavo knew what it meant—a new mission for the Secret Explorers! He hurried to the elevator, tingling with

excitement. The doors slid open by themselves and Gustavo stepped inside. All around him was a brilliant white light. Wind whipped around Gustavo. It made him feel as if he were whizzing through the brightness. Then a moment later the light faded. Gustavo was back at the Exploration Station! It had gleaming black stone walls, a map of the world on the floor, and a huge picture of the Milky Way on the ceiling. There was a line of computers along one wall. "Gustavo— here!" he called.

A girl wearing a leaf-green T-shirt and a boy with red hair jumped up from a squishy sofa. They both grinned. "Hi Leah," said Gustavo. "Hi Ollie!" "I was just showing Ollie my new book about beetles," said Leah. She was the Biology Explorer, and knew all about plants and animals. Ollie was wearing a shirt with a parrot pattern—he was the team's rainforest expert. Soon the other Secret Explorers arrived through the white glowing doorway, one after the other. A girl skateboarded in. "Kiki—here!" She was the Engineering Explorer, and had made the skateboard herself.