334 records found. Displaying 49 - 72.
Vaccines are biological substances that cause the human immune system to build up its defenses against specific diseases. Public health officials recommend a series of vaccines for all… Read More →
A visually stunning look at innovative and eye-popping measures used to protect ships during World War… During World War I, British and American ships were painted with bold colors and craz Read More →
From the Series Sandra Markle's Science Discoveries
African penguins waddle around nesting colonies in lower numbers than ever before. Despite South African government efforts to protect the penguin colonies and their ocean fish supply, young… Read More →
Bruno, the cat in the checkered cap, takes life as it comes. When it's too rainy to go outside, his friends come around for breakfast. When a fish invites him into the river, he follows it… Read More →