The Economist explains
The Economist explains
Why has Canada killed off the penny?
Why it makes sense for Canada to eliminate its smallest unit of currency
The Economist explains
Why does Michael Dell want to take his company private?
Why Mr Dell wants to buy his company back again
The Economist explains
Why is the kilogram getting heavier, and what can be done about it?
The kilogram is unique among scientific units in being defined by an artefact, rather than by physical phenomena
The Economist explains
What are Instagram and Twitter fighting about, and why?
Each network is trying to prevent the other from appropriating the valuable data it has amassed from users
Technology quarterly