A forest of hypotheses

Falling in love with a single theory can cut off fruitful avenues of enquiry. Here’s how to keep your mind open. The clamour in a Panamanian rainforest is deafening to human ears: bugs shriek, birds sing and bats screech throughout the humid night. To avoid attracting predators, male katydids (Tettigoniidae) trill out short, infrequent mating … More A forest of hypotheses

The long, bitter debate over Meteor Crater

Long before Arizona’s Meteor Crater got its name, scientists puzzled over its origin. Grove Gilbert, a well-respected figure at the US Geological Survey, thought a steam explosion had hollowed out the vast bowl of desert, while a scientific outsider named Daniel Barringer insisted that an impact had blasted it out. It took more than half … More The long, bitter debate over Meteor Crater