Physics
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We summarize the week's scientific breakthroughs every Thursday.
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		PhysicsHow freezing a soap bubble turns it into a ‘snow globe’
Frigid air makes soap bubbles shimmering orbs thanks to surface tension.
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		PhysicsIn a first, Galileo’s gravity experiment is re-created in space
A key principle of general relativity holds up in a new space-based test.
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		Materials ScienceNew 3-D printed materials harness the power of bacteria
The three-dimensional materials contain live bacteria and could generate wound dressings or clean up pollutants.
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		PhysicsCollision illuminates the mysterious makeup of neutron stars
Scientists size up neutron stars using gravitational waves and light.
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		Quantum Physics‘Arrow of time’ reversed in quantum experiment
In quantum systems, heat can flow “backward,” from cold to hot.
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		Materials ScienceThis material does weird things under pressure
A new metamaterial has a seemingly impossible property: It swells when squeezed.
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		Particle PhysicsExcess antielectrons aren’t from nearby dead stars, study says
Pulsars might not be behind excess antimatter, gamma-ray observations suggest.
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		PhysicsColliding black holes are reported for a fifth time
LIGO spots another merger, this time with less fanfare.
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		PhysicsWhy the wiggle in a crowd’s walk can put a wobble in a bridge
New simulations can better predict when pedestrians cause a bridge to shimmy.
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		Quantum PhysicsQuantum computers take a step forward with a 50-qubit prototype
Race to build ever-more-powerful processors edges the technology closer to being able to best traditional machines.
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		Quantum PhysicsQuantum computing steps forward with 50-qubit prototype
Bit by qubit, scientists are edging closer to the realm where quantum computers will reign supreme.
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		ArchaeologyMystery void is discovered in the Great Pyramid of Giza
High-energy particle imaging helps scientists peek inside one of the world’s oldest, largest monuments.