Eight of the most mind-bending optical illusions in art

18 May 2016

Kelly GrovierFeatures correspondent

Eight of the most mind-bending optical illusions in art

The naked portrait covered up for centuries

The surprising story of a 16th Century rhino called Ganda

The forbidden erotica of ancient Pompeii

The microcosm and the macrocosm of Frida and Diego

The chair that took 10,000 man-hours to create

A cheat's guide to... Picasso's Guernica

Idris Elba used his waxwork figure to unlock his phone

The Korean food ritual that leads to happiness

The price of gold rises as political tensions increase

Diving into La Palma's underwater lava world

Sports betting is now everywhere. Is that dangerous?

Wall Street muted at the end of tumultuous week

Es Devlin's powerful art invites a closer look at strangers

The gadgets set to change your daily health and wellness

Inside the search for South America's most cryptic bird

US futures slide as tariff fears trigger sell‑off

Morocco fossil finds re-write the origins of our species

Arnold Schwarzenegger goes big on Christmas

Lina Ghotmeh on crafting the future from the past

Karl Ove Knausgård: The writer who broke the rules

The strange story of this iconic logo

Is Kristen Stewart our best actress?

Clinton and Trump's image war

Where does canned laughter come from?

The belly dance sparking controversy