Breast cancer detection is now as easy as digging through your purse for your car keys. BeadPositive key chains have beads the size of potentially dangerous breast lumps. The colorful wooden beads ...

Measure a 40cm piece of thread and cut it. Use this as a measurement to cut another piece of the same length (you will need 2 40cm pieces). Fold one of the pieces over and tie an overhand knot on the ...