Drugged to death

US waterways highly contaminated by a cocktail of drugs

Startling links

Viruses of many ailments, including common cold and HIV, have common genetic traits

Tick of the body clock

Chemical that plays a crucial role in regulating human body's chemical chain identified

Foul-free

Quick way to make compost

Stubborn nematodes

How the roundworms became resistant to avermectin

Oilfree, naturally

Biosurfactants from bacteria help filter wastewater

Red means stop

Electric barrier

Water purifier that kills 98 per cent bacteria, fast

Shaping genetic inheritance

Same genes express differently due to smoking, alcohol, stress

The chorus is dying

A virulent fungal disease is killing frogs in what might be the sixth mass extinction

Earth has room for more

Multiple habitats helped tetrapods grow and diversify

40 km for Rs 5

Indian scientists design a bike engine that runs on air

Sanguine approach to circulation

The physics of blood flow gives a clearer view of its physiological role

Beauty has its uses

Ornamental plants clean the water they grow in

It pickpockets water

A protein makes the body realize the liquid’s worth  

25 million years of error

Scientists got the origin of flowering plants wrong

Appearances can be deceptive

Bone again

Basic instinct

Imaging: the future

FARHAT BASIR KHAN zooms in on the heart of motion in a picture  

Winter relief

Insects travel 4,000 km to avoid the cold British weather

Can't walk, will smoke

Weld-on

Advancements in laser techniques have made underwater welding possible

Sniffers Inc

NET WORK