Filter
Naturvetenskap & teknik
Filter
From tiny hummingbirds to huge ostriches, all birds lay eggs These eggs look very different from one another. Do these species' life cycles vary as much as their appearances do? …
From alligators and snakes to lizards and turtles, there are many different species of reptiles in the world Some reptiles lay eggs and some give birth to live young. In this …
From tiny seahorses to massive blue marlin, there are more than 30,000 species of fish in the world. Though many distinctions appear across the various species, the basic life …
How does a caterpillar transform into a butterfly? What do baby bees look like? Which insect species hatch from eggs? What exactly is molting? Readers learn the answers to these …
From people to platypuses to whales, there are many kinds of mammals in the world How can animals that are so different go through a similar life cycle? In this interesting and …