Kolmogórov

“Dino” Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children’s books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these small dinosaurs face-to-face: Little Lesothosaurus was the length of a house cat! Epidendrosaurus could climb into trees like a squirrel! Liaoceratops had body armor and horns-and was only the size of a collie dog! Plus,...

Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!

Learn how musical instruments work with this Spanish STEAM reader that builds literacy and critical thinking skills through real-world examples and features a hands-on lab activity.

Como estudiante en la prestigiosa escuela Bradley, Ani FaNelli no paso la mejor de las adolescencias. Ahora, con un trabajo glamuroso, un armario caro y un apuesto novio, esta muy cerca de vivir la vida perfecta y frivola por la que ha estado trabajando tan duro. Pero Ani tiene un secreto. Hay algo en su pasado que todavia la persigue: algo privado, oculto, secreto y doloroso que amenaza con destruirlo todo. Con una voz y un estilo tan singular como lleno de giros dramaticos, La chica que lo tenia todo explora la presion insoportable bajo la que viven muchas mujeres, aquellas que se ven...