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Rare gravitational lens caused by mysterious source

The "milli-lens" holds the promise of probing the universe at new scales

Row threatens Chinese telescope

Astronomers disagree over optical design

US eclipse spoiler alert

Flash Physics: need-to-know updates from the world of physics

Squid see clearly in low light using linked proteins

Refractive-index gradient reduces spherical aberration

Light is seen to scatter off light

Lead-ion collisions reveal phenomenon forbidden in classical physics

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Synchronizing position synchronized output with mode-locked lasers

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Indian independence, Doppler effect on a train, contagious science

Excerpts from the Red Folder

The American eclipse: wonder, science and festivities

The total solar eclipse offers unique conditions for science



Music and science: a harmonious or discordant duo?

Podcast The fascinating things, and the limits, of what science can tell us about music



From hype to hyperloop

Vacuum-based transport systems could clear the way for faster, cheaper travel – or so proponents claim. Jon Cartwright takes a closer look


When goofing off is good

Particle physicist Daniel Whiteson describes his collaboration with the artistic brains behind PHD Comics



Building bridges with the West

Fuchun Zhang on the challenges of attracting researchers to China


Whose cave is it?

Robert P Crease is unhappy about what some physicists think about Plato



Building baby universes

A Big Bang in a Little Room delves into the scientific, moral and theological questions behind the quest to create new universes; says Peter Coles

Innovation & industry

Focus issue

Physics World Focus on Vacuum and Instruments

Free to read Testing space-bound instruments, vacuum-based transport systems, securing the helium supply chain and more

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