Prize winner Thomas Siegert (IMAGE) University of Würzburg Caption Astrophysicist Dr Thomas Siegert in front of a representation of the annihilation radiation (γ, left) of electrons (e-) with their antimatter partners, the positrons (e+), in the Milky Way (centre). Credit Thomas Siegert / University of Wuerzburg Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.