No snark or anti-commercialism rantings here, just a dose of simple sweetness. We asked readers to share their most memorable Valentine's Day cards; here are a few of our favorites, edited for length ...

You can draw a heart in Photoshop by drawing it freely with the paintbrush, by creating paths with the pen tool or by sculpting an imported shape using the eraser. But the easiest way to add a heart ...

Researchers in Spain have created a high resolution atlas of the heart with 3-D images taken from 138 people. The study demonstrates that an average image of an organ along with its variations can be ...

AROUND 1513, Leonardo da Vinci made detailed drawings of the heart and wrote nearly 2000 words of notes on the organ in his characteristic mirror handwriting. Intrigued by the way the aortic valve ...