ESA astronaut Alexander Gerst presents some of the science he has been doing on the International Space Station half way through his six-month Blue Dot mission.

Blue Dot: three months of science in space

ESA astronaut Alexander Gerst gives an overview of some of the science he has performed during his Blue Dot mission on the International Space Station so far. From robotic surgery to vaccines and accurate thermometers, research in space is bringing benefits for humans on Earth.

Watch as Alexander takes you through some of the highlights of his mission.

Read more about his Blue Dot mission here http://www.esa.int/Our_Activities/Human_Spaceflight/Blue_dot

Follow Alexander here: http://alexandergerst.esa.int/