A newly discovered cluster-scale strong gravitational lens, with a rare alignment of seven background lensed galaxies, provides a unique opportunity to study cosmology. In a rare and extraordinary ...

Astronomers at the University of Chicago, MIT and elsewhere have used a massive cluster of galaxies as an X-ray magnifying glass to peer back in time, to nearly 9.4 billion years ago. In the process, ...

Van Leeuwenhoek's microscope's were simple gadgets by today's standards, with a spike to hold the object being studied and a single magnifying lens to look through. Antonie Van Leeuwenhoek, the 17 ...