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 ...

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 ...

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 ...