Rory Collins: Blood, sweat and tears

Alok Jha meets the scientist who wants to recruit half a million people for a controversial medical project.

Panel to expose fraudulent medical research

Panel set up to combat medical research fraud calls on universities and NHS to view such misconduct as seriously as financial fraud.

Creator of pill on science, sex – and anniversaries

· Chemist pooh-poohs 50th birthday celebrations · Reports of wonder drug also come in for criticism

The ideas interview: Aubrey de Grey

John Sutherland meets a scientist who is confident we are approaching 'escape velocity' for defying ageing.

The sceptic

Do we still need animal testing in medical research?

Gasp reflex linked to cot death

· Inability to restart breath might put babies at risk · Mechanism controlled by separate part of brain