
Two doctors made a tool. It can help people who are sick. The tool can help scientists cure diseases. They won an award for the tool!
Photo Credit: MIGUEL RIOPA/Stringer/Getty Images
Objects are compared in different ways. Quantity is a way … read more
Zelia Nuttall was an archaeologist from California. Archaeologists are scientists … read more
Turtles, snakes, and lizards are reptiles. Frogs, toads, and salamanders … read more
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