Today on New Scientist: 23 April 2012

Photo exhibition brings new light to ocean depths

Just about any task has been turned into an app, and now there's the exciting prospect of obtaining chemicals on demand from 3D printers

Luminous life on show

A new exhibition at the American Museum of Natural History in New York celebrates luminescent wildlife - and may introduce the first known biofluorescent eel

Leeches help track down endangered species

The bloodsucking worms store blood from a meal for months, betraying the identity of their prey - which could help find and count endangered species

Male bowerbirds grow a garden to attract a mate

Male spotted bowerbirds affect the distribution of plants around their display structures - is it evidence of cultivation?

Flap around London with the Pigeon Simulator

A combination of Kinect and Google Earth lets users live the life of a pigeon, soaring over London

Human nature: Six things we all do

From law to gossip, find out what universal characteristics make us human. Kate Douglas and Bob Holmes report

Wearable muscle suit makes heavy lifting a cinch

A lightweight exoskeleton will allow the elderly to move around more easily. New Scientist heads to a Japanese laboratory to try it on for size

The Arab Spring puts a strain on Jordan's ecology

An influx of refugees from war-torn Syria is draining Jordan's main oasis and depleting wildlife and water supplies, says Debora MacKenzie

Arctic methane leaks threaten climate

Patches of methane over cracks in Arctic sea ice suggest that the greenhouse gas is escaping as ice retreats

Dino-bird had oldest known case of osteoarthritis

Fossilised ankle bones of Caudipteryx, a dino-bird that lived 130 million years ago, show signs of the painful bone condition

Invent a balloon shape, print it, then just blow

Want a party-balloon bunny or sausage dog but don't have the twisting skills? 3D printing may soon provide balloons of any shape

Sound waves help quantum computers scale up

The multiverse-delving potential of quantum computing could become possible with a device that welds two existing technologies using the power of sound

In tornado season, words save lives

New, more visual warnings may have limited the death toll from last weekend's 100 tornadoes in the US Midwest

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