Our cells constantly receive DNA damage from factors such as ultraviolet rays, irradiations, toxins and chemicals. For women, ...

Activities for students and lesson plan ideas based on Times articles, photos, videos and graphs. Advertisement Have You Ever Experienced Heartbreak? A breakup? The end of a friendship? The death ...

pH is a measure of how acidic or alkaline a solution is. The diagram below shows what happens to an enzyme when denaturation occurs. Each enzyme has an optimum pH but it also has a working range ...

Free, trusted NHS advice and guidance to help you have a healthy and happy baby during pregnancy, birth and parenthood.