Wasting water is a luxury we can no longer afford

Worrying about how much water to drink each day is misleading – our real problem is the growing shortage that threatens four billion people on Earth

Italian tax clampdown dims the sparkle at Bulgari

Tax affairs of billionaire Bulgari heirs Nicola and Paolo in the spotlight as authorities target luxury brands

V&A conservators race to preserve art and design classics in plastic

Materials that reshaped design in the 20th century are now showing signs of degradation due to the instability of plastics

Tate Modern at 15: still delivering the shock of the new

The Bankside museum has transformed modern art from an elite cult into mass entertainment, but is it time to get down to some proper studying?