'Bottom-heavy squirmers' adopt characteristic group behaviours

From starling aberrations to self-turbulent fluids, 'active systems' encompass a wide family of phenomena in which individual objects propel themselves forward, allowing them to display intriguing collective behaviors. On ...

Astronomers recategorize asteroid-like comet

Recently discovered object 2019 LD2, originally believed to be the first cometary "Jupiter Trojan" asteroid by astronomers at the University of Hawaiʻi at Mānoa Institute for Astronomy turns out to be an interloper comet ...

Expandable foam for 3-D printing large objects

It's a frustrating limitation of 3-D printing: Printed objects must be smaller than the machine making them. Huge machines are impractical for printing large parts because they take up too much space and require excessive ...

High color purity 3-D printing

Selective powder sintering for 3-D printing has recently become an increasingly affordable solution for manufacturing made-to-order elements of almost any shape or geometry. This technique involves heating a bed of powder ...

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