Your DNA is continually damaged^[1] by sources both inside and outside your body. One especially severe form of damage called a double-strand break^[2] involves the severing of both strands of the DNA double helix.

Double-strand breaks are among the most difficult forms of DNA damage for cells to repair because they disrupt the continuity of...

Curious Kids^[1] is a series for children of all ages. If you have a question you’d like an expert to answer, send it to This email address is being protected from spambots. You need JavaScript enabled to view it.^[2]. Is Mars really as red as people say it is? – Jasmine, age 14, Everson, Washington People from cultures across the world have been looking at Mars since ancient times. Because

It is “the policy of the United States to promote AI literacy and proficiency among Americans,” reads an executive order^[1] President Donald Trump issued on April 23, 2025. The executive order, titled Advancing Artificial Intelligence Education for American Youth, signals that advancing AI literacy is now an official national priority.

This...