Researchers have developed swarms of 300-micrometer magnetic microrobots capable of manipulating, rotating, and assembling objects without making physical contact, instead using fluidic torque to create controlled whirlpools in surrounding liquid that exert force on larger objects

The Gordie Howe International Bridge, which would connect Ontario and Michigan and would be a vital economic artery between the two countries, is scheduled to open this year. But Trump has now threatened to block the bridge from being opened