Twitter edit button finally being tested

Twitter’s edit button allows tweets to be edited a couple of times 30 minutes after being posted. Twitter Blue subscribers will get access to it in late September.

Fleet of hydrogen passenger trains debuts in Germany

A fleet of hydrogen-powered passenger trains is replacing diesel trains that previously operated on nonelectrified tracks in Germany. The trains use hydrogen fuel cells to generate electricity, saving about 420,000 gallons of diesel fuel a year.