Moog goes back to the future with re-issues of classic synthesisers

US company plans to hand-build a limited run of three large-format synthesisers first released in 1973 – with price tags ranging from $10,000 to $35,000

World’s cities experiencing more heatwaves, study shows

Number of extremely hot days a year has increased in hundreds of cities since the 1970s years, with frequencies peaking in the last five years

Green news roundup: fracking bans, Paris climate summit and pine martens

The week’s top environment news stories and green events. If you’re not already receiving this roundup, sign up here to get the briefing delivered to your inbox

Fashion archive: Tie manufacturers tell fashion writers to get knotted

4 February 1975: The body that represents tie makers claims the wearing of ties is not dying out, and their survey reveals that neckties give men ‘sexual mystique’

How Monet became blue chip: the language of wealthy art buyers

Painting of the Grand Canal expected to fetch up to £30m, amid surging interest from super-rich in Asia and Middle East

Sales of printed books fall by more than £150m in five years

New figures from Nielsen BookScan show continuing decline since 2009 as more and more readers migrate to ebooks