Editor's note

Stock markets took a tumble at the start of this week, with a sharp drop in the Dow Jones industrial average triggering a selloff in both Asian and European markets. Despite the high drama on trading floors, Arturo Bris outlines three reasons why there’s no cause for panic.

For most of us, getting snapped up into the belly of a gargantuan predator would spell the end. Not so for the bombardier beetle, which when eaten releases a caustic concoction so potent that it can make a hungry frog vomit. Luc Bussiere talks us through this fiery defence mechanism.

Oscar Wilde famously proclaimed sarcasm to be the lowest form of wit. But he also thought it the highest form of intelligence, so perhaps it’s no surprise that sarcasm is often associated with teachers and withering classroom put downs. There are even claims that sarcasm is a useful teaching tool that stretches minds and boosts creativity. Yeah right, says Richard Dunk. Sarcasm can be alienating and discriminating for young people, so it’s probably best to save it for the staff room.

Annabel Bligh

Business + Economy Editor

Top stories

EPA

Three reasons not to worry about the stock market 'crash'

Arturo Bris, IMD Business School

The Dow Jones just suffered its largest single-day points drop in history. But don't panic.

What goes in must come out. Sugiura & Sato, Kobe University

How bombardier beetles survive being eaten – and other amazing animal defence mechanisms

Luc Bussiere, University of Stirling

Meet the brawny bug with a concoction so caustic it'll make a toad vomit.

Shutterstock

Why sarcasm is such a brilliantly inclusive and effective way to teach children – not

Richard Dunk, Manchester Metropolitan University

Sarcasm can alienate and discriminate.

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