科学与环境
Too many e-scooters? Blame competition
来源: Phys.org - latest science and technology news stories · 发布于
In 2018, something strange happened on sidewalks across America. In 65 cities, thousands of electric scooters appeared seemingly overnight, often with little or no advance notice to local governments. Cease-and-desist orders flew. Scooters were impounded. Even after cities impose
In 2018, something strange happened on sidewalks across America. In 65 cities, thousands of electric scooters appeared seemingly overnight, often with little or no advance notice to local governments. Cease-and-desist orders flew.
Scooters were impounded. Even after cities imposed regulations, there seemed to be far more scooters than anyone could ever use.
相关报道
Tech barons cozied up to Trump. What will they do in newly blue America?
Democrats’ success was helped by popular anger over tech, AI and the super rich – life for billionaires could become much more difficult The photo of Silicon Valley centibillionaires at Donald Trump’s inauguration – Musk, Bezos and Zuckerberg, front row and side by side – now loo
Business | The Guardian ·
The great sleeping giant of America has awakened | Robert Reich
The real question in my mind is whether Democrats will take advantage of the new age of populism The great sleeping giant of the US has awakened, taken a hard look at what’s become of the nation, and roared a thunderous “NO!” What occurred on Tuesday was not – as some are saying
Business | The Guardian ·
From scooters to shampoo - the people saving hundreds from dumpster diving
The men and women who rummage through commercial bins to take clothes and other items.
feeds.bbci.co.uk ·
Why the UK is dithering over what to do about e-scooters
Why is it taking so long for the government to regulate them, and what are the consequences of delay?
feeds.bbci.co.uk ·
After 40 years of searching, physicists find evidence for an ultrarare particle decay
Physicists at CERN report that they've detected evidence of a rare meson particle decay (B⁰→ µ⁺µ⁻) that occurs when the meson's beauty quark annihilates with a down-type quark. The pair decays into a muon and antimuon, which are particles similar to electrons. Because evidence fo
Phys.org - latest science and technology news stories ·