This video explores the accidental discoveries that shaped the development of plastic materials. From early breakthroughs like Bakelite to the unexpected creation of polyethylene in 1933, we trace how ...

When I tried to calculate the mean_exp by using the function: calculate_avg_exp(), it reminded that ：错误于validObject(.Object): 类别为“LogMap”的对象无效: Duplicate rownames not allowed. No matter I use the data ...

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Today on the Money blog, Sky News' consumer hub - our regular Mortgage Guide reveals rates have risen for the first time in eight months. Plus, it's Friday - so watch out for our latest newsletter and ...

Today in Money: Several big companies - Klarna, Microsoft and Amazon - have replaced human roles with AI, but what could this technology mean for the future of your job? We speak to workers, ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

CC0 Usage Conditions ApplyClick for more information. Rear Admiral Joy Pledges Use of Naval Calculating Machinery To Scientists; Aiken Stresses Acute Need for Convention; President Conant, Sick, Is ...

Whether states can find the money in their budgets — billions of dollars in some cases — will have wide-ranging, and likely uneven, consequences for some 42 million recipients. By Linda Qiu Reporting ...