12 May 2021
Nitrogen pollution poisons our water and clogs our air – and it exacerbates other environmental problems. But if we organise now, we can fight back before it’s too late
12 May 2021
Whale sharks are the world’s largest fish but they can suspend themselves upright while feeding at the water’s surface by sucking in enough air to float
7 May 2021
A new US Navy autonomous drone will locate birds’ nests near airfields, armed with a device that covers the eggs in oil to suffocate the embryos and prevent them hatching
7 May 2021
A proposal to power a future Mars base includes an enormous kite flown by robots, along with solar power and a battery that stores energy by compressing gas underground
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
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
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
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
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
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
