It’s winter in the Northern Hemisphere, and for many people that means having the spotlight on your body’s largest organ—skin. In cold climates the skin can become substantially drier ...

RNA (ribonucleic acid) is a nucleic acid polymer where the carbohydrate is ribose. RNA is generally single-stranded, as DNA is transcribed by RNA polymerases into mRNA (messenger RNA), which is ...

DNA (deoxyribonucleic acid) is the nucleic acid polymer that forms the genetic code for a cell or virus. Most DNA molecules consist of two polymers (double-stranded) of four nucleotides that each ...

43.2 x 64.4 cm. (17 x 25.4 in.) ...