It's the number one killer of women in the US and UK and yet heart disease is sometimes thought of as a man's disease. The American Heart Association warns that women's underrepresentation and research for cardiovascular disease is putting lives at risk and is calling for greater focus on women's health. But, as Emma Keeling discovers, it's not just heart disease where gender bias is a problem. There is a historical bias across the medical profession that continues to persist today with life threatening consequences.

Ageing and illness are inescapable facts, as cells in our body malfunction and die over the passage of time. But this may not be inevitable. Scientists in the ageing field have started to look at the role of mitochondria, the battery packs of every living cell. Shini Somara went to University College London to find out how energy levels in the cells of retinas can be boosted using specific wavelengths of light. Recharging the mitochondria to improve our eyesight could be just the start of this research - and early signs are that they could hold the key to a host of issues that we have only just begun to explore.