They’re furry and funny. They’re tracked and tricky. What are they? Animal mysteries, of course! Get ready to crack the cases and the real animal info wide open. You might need your camouflage for this one.

They’re explosive and invisible. They’re extinct and never ending. What are they? Science mysteries, of course! Get ready to crack the cases and the real science info wide open. You might need your goggles for this one.

They’re multiplied and divided. They’re spectacular and average. What are they? Math mysteries, of course! Get ready to crack the cases and the real math info wide open. You might need your abacus for this one.

A journal for the farm, the garden, and the fireside, devoted to improvement in agriculture, horticulture, and rural taste; to elevation in mental, moral, and social character, and the spread of useful knowledge and current news.

Help children of all learning styles and strengths improve their critical thinking skills with these creative, cross-curricular activities. Each engaging activity focuses on skills such as recognizing and recalling, evaluating, and analyzing.

A look at new animal discoveries around the world.

Popular Mechanics inspires, instructs and influences readers to help them master the modern world. Whether it’s practical DIY home-improvement tips, gadgets and digital technology, information on the newest cars or the latest breakthroughs in science -- PM is the ultimate guide to our high-tech lifestyle.

Known as the "Big Book," the basic text of Alcoholics Anonymous has helped millions of people worldwide get and stay sober since the first edition appeared in 1939. Opening chapters articulate A.A.’s program of recovery from alcoholism — the original Twelve Steps — and recount the personal histories of A.A.'s co-founders, Bill W. and Dr. Bob. In the pages that follow, more than 40 A.A. members share how they stopped drinking and found a new healthier and more serene way of life through the Fellowship of Alcoholics Anonymous. Whether reading passages at meetings, reading privately for personal reflection, or working with a sponsor, the Big Book can be a source of inspiration, guidance and comfort on the journey to recovery. This Fourth Edition of Alcoholics Anonymous has been approved by the General Service Conference.