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In a First, America Dropped 30,000-Pound Bunker-Busters—But Iran’s Concrete May Be Unbreakable, Scientists Say ( www.popularmechanics.com )

Previously, a yield strength of 5,000 pounds per square inch (psi) was enough for concrete to be rated as “high strength,” with the best going up to 10,000 psi. The new UHPC can withstand 40,000 psi or more. ...

New research reveals Uber's algorithmic pricing leaves drivers and passengers worse off ( techxplore.com )

The study analyzed data from 258 UK Uber drivers over more than 1.5 million trips between 2016 and 2024. This revealed a significant shift when Uber introduced a dynamic pricing algorithm in 2023. Passengers now pay more per trip, but drivers' earnings have declined. Adjusted for inflation, drivers' hourly income fell from over ...

Astronomers discover new evidence of intermediate-mass black holes ( phys.org )

In the world of black holes, there are generally three size categories: stellar-mass black holes (about five to 50 times the mass of the sun), supermassive black holes (millions to billions of times the mass of the sun), and intermediate-mass black holes with masses somewhere in between. ...

Webb telescope helps refine Hubble constant, suggesting resolution to long-standing expansion rate debate ( phys.org )

For the past decade, scientists have been trying to get to the bottom of what seemed like a major inconsistency in the universe. The universe expands over time, but how fast it's expanding has seemed to differ depending on whether you looked early in the universe's history or the present day. If true, this would have presented a ...

Color-correcting algorithm removes the effect of water in underwater scenes ( techxplore.com )

A team from MIT and the Woods Hole Oceanographic Institution (WHOI) has developed an image-analysis tool that cuts through the ocean's optical effects and generates images of underwater environments that look as if the water had been drained away, revealing an ocean scene's true colors. The team paired the color-correcting tool ...