Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Sixty-five years ago, a metal sphere the size of a basketball caught the U.S. science, military and intelligence communities by surprise. Sputnik 1, the first artificial satellite, launched into orbit ...

Re “If Science Keeps Changing, Why Trust It?,” by Elay Shech (Opinion guest essay, Jan. 7): Professor Shech offers a thoughtful argument for what he calls “disciplined trust” in science, a position ...