The warped ways of cosmic light https://www.mpg.de/1187003/Gravitational_Lenses_Simulation
Albert Einstein predicted them, modern giant telescopes detected them – and Klaus Dolag simulates them on a computer: gravitational lenses. The academic staff member at the Max Planck Institute for Astrophysics in Garching and at the University Observatory Munich uses this physical phenomenon to such ends as weighing galaxy clusters and probing that ominous substance known as dark matter.
the men had been traveling for weeks to reach the volcanic island in the Gulf of Guinea