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The world is hot enough: MI6 has started spying on climate polluters

5 May 2021

MI6 starts spying for the planet, plus what Instagram can teach us about birds and cryptocurrency meets magic mushrooms, in Feedback’s weird weekly round-up

Microwave weapon could disable a swarm of military attack drones

14 April 2021

Military drones can resist radio-jamming anti-drone devices, but a microwave weapon could take down a whole swarm at once, or disable just one with sniper-like precision

Female monkeys call to males when they see a predator approaching

10 April 2021

Female putty-nosed monkeys of West Africa will use calls to enlist the help of males when they see a leopard approach

NASA is about to fly a helicopter on another planet for the first time

8 April 2021

The Ingenuity helicopter, which hitched a ride to Mars aboard NASA’s Perseverance rover, is getting ready to perform its first test flight on 12 April

Redesign makes drones quieter and less annoying without losing thrust

7 April 2021

Drones can be loud and irritating, but by redesigning the rotors the noise they make could become more palatable without a loss of thrust

The US Navy has a mechanical battery that could power laser weapons

19 March 2021

A small mechanical battery based on spinning flywheels can deliver short bursts of high power, which the US Navy could use for energy weapons or railguns

Aircraft contrails are a climate menace. Can we rid the sky of them?

17 March 2021

The wispy cloud trails left by aircraft cause more warming than the carbon emissions from their fuel. Now there might be a simple way to stop them forming

Here's hoping for robo-swarms very soon

10 March 2021

Eagle-inspired robot flies by flapping its feather-covered wings

3 March 2021

A robot that looks like a bird, flaps its wings like a bird and flies like a bird could be used as a stealthy, camouflaged drone

How to spend a trillion dollars to fix climate change and end poverty

24 February 2021

Let’s imagine you have inherited a fortune and want to solve the world’s most pressing problems. Here’s the best way to spend your money to make a difference to climate change, disease and poverty