Melvin Berger

Did you know that wolves howl to warn their enemies away? Or that there are many different kinds of wolves, such as the tundra, timber, and red wolf? Written by renowned non-fiction authors Melvin and...

Amusing illustrations help show the many ways in which sound, heat, and light work to help us in our daily lives.

QuĂŠ Cenan Los Tiburones? Encuentra las respuestas a mĂĄs de 75 preguntas sobre los tiburones. ¿Siempre tienen hambre los tiburones? ¿Son fuertes las mandĂ­bulas del tiburĂłn? ¿DĂłnde tienen los oĂ­do...