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An ordinary construction project uncovers an extraordinary archaeological discovery.

Imagine you're watching a backhoe dig up the ground for a construction project when a round object rolls down a pile of dirt and stops at your feet. You pick it up, brush off some dirt, and realize you're holding a skull!

This is exactly what happened in Albany, New York, in 2005. Workers were putting in new sewer line

La hibernación es un ciclo que algunos animales hacen cada año. La mayoría de la gente sabe que los osos hibernan. ¿Pero por qué hibernan? ¿Y qué otros animales hibernan?

Hibernation is a cycle that some animals go through every year. Most people know that bears hibernate. But why do they hibernate? And what other animals hibernate?

Invierno, primavera, verano y otoño—las estaciones son uno de los ciclos más familiares de la naturaleza. Pero, ¿por qué cambia el clima? Aprenda por qué los patrones climáticos cambian a lo largo de las estaciones.

Winter, spring, summer, and fall—the seasons are one of nature's most familiar cycles. But why does the weather change? Learn why weather patterns change over the seasons.

With a lively rhyming text and vibrant paper collage illustrations, author-artist Bob Barner shakes the dust off the dinosaur bones found in museums and reminds us that they once belonged to living, breathing creatures. Filled with fun dinosaur facts (a T. Rex skull can weigh up to 750 pounds!) and an informational Dinometer, Dinosaur Bones is sure to make young dinosaur enthusiasts roar with delight.

Muhammad Ali, born Cassius Marcellus Clay Jr., was known for his battles in the ring as well as his achievements outside of it. An outspoken activist, he joined the Nation of Islam and followed Malcolm X during the Civil Rights Movement. He refused to fight in the Vietnam War for a cause he did not believe in, even though some saw him as a coward. Even with failing health from Parkinson's disease, Ali continued to fight for and defend people who