"Get these dinosaurs out of here!" cried Professor Flashback.
Several dinosaurs jumped onto a table and knocked over equipment.
A small clock fell down and broke.
Another dinosaur ate books from the bookshelf.
"They're destroying my laboratory!"
Professor Flashback pulled at his hair.
Roxy saw a big dinosaur bump into the big clock.
The clock rocked.
Roxy gulped.
"If that clock breaks, Metro City will be trapped in the past!"
She darted to the clock and grabbed it.
The clock's big hand was pointing to the year 65 million BC.
"Shoo!" said Professor Flashback.
He was pushing three small dinosaurs away with a broom.
He suddenly spotted Roxy near the clock.
"What are you doing?" he yelled.
Roxy glared at him.
"I'm bringing Metro City back to the present!"
She grabbed the clock's hand.
"No!" cried Professor Flashback. "Do not—oof!"
A fat dinosaur knocked the professor down.
Roxy yanked the clock's hand.
She turned it to the present.
Electricity shot through the lab.
In a moment the electricity was gone.
And so were the dinosaurs.
Roxy took a deep breath. "Whew!"
Professor Flashback grinned.
"Thanks for saving my clock," he said.
Roxy turned back to the clock.
Whiz-hoo! Her eye laser beams blew the clock into a million pieces.
"No!" the professor cried.
"That clock is dangerous," said Roxy.
"And you, Professor Flashback, are in big trouble."
The professor narrowed his eyes at Roxy.
He pulled his sleeve up.
A small golden watch was on his wrist.
"Good-bye, Rocket Girl," said Professor Flashback.
He pressed a button on his watch.
Za-wap! Electricity flashed and the professor disappeared!
Roxy scratched her head.
"I wonder where he went."
The next day Roxy and her friends were at the Natural History Museum.
Lots of fossils and dinosaur bones were on display.
"Wow!" said Jack. "A T. rex skeleton!"
Mara smiled. "It's a lot less scary than a live T. rex."
Roxy pretended to sigh.
"I can't believe I missed those dinosaurs."
Terrell gave her a suspicious look.
The friends saw a cave painting from the Stone Age.
It showed cavemen hunting animals.
One caveman looked different from the others.
"Is that guy wearing a hat?" asked Terrell.
"I think so," said Jack.
"It looks like he has binoculars too."
"That's weird," said Mara.
"Binoculars didn't exist back then!"
Roxy looked at the man and smiled.
But she didn't say a word to her friends.