You're as free to write anything in the sky as you are to post it on the internet, provided you have a plane, or a pilot willing to relay your message.
New technologies can help locate large methane leaks in a faster and more effective manner.
Many fans think the VAR is ruining the Women's World Cup.
In spite of noble promises in their constitutions, many countries have a very restrictive approach to demonstrations.
These days surveillance isn't just CCTV. Police now have access to body cams, drones and facial recognition systems – and it's helping police not only solve crime, but prevent it too.
Commercial and recreational drones are taking to the air. They're very noisy, and neighborhoods everywhere could become awfully loud.
Nobody has yet figured out what the rules are for drones or what constitutes 'good manners' for drone operators. But there are legitimate reasons a drone might be near your home.
Science fiction has made us vigilant of 'killer robots' in our midst, but they're far closer than many of us realise.
Civilian casualty counts are a powerful tool for propaganda – and for establishing peace.
Drones already help with search and rescue, but teaching machines to identify victims on their own could free up human rescuers to do other crucial work.
Drone technology plays a vital role in gathering accurate wildlife data. But this alone isn't enough to save Africa's elephants.
CASA says we could have flying taxis operating in Australia within five years. But there are a few hurdles to clear before we see ride sharing happening in the air rather than on the ground.
Drones are being used to combat malaria in Zanzibar.
The UK has fallen victim to drones, chemical weapons and cyber-attacks in recent years. But at least it's got a really big boat.
Cheap, powerful, and more widely used by greater numbers of people, drones are causing a headache at supposedly secure locations worldwide.
Drones are low cost and easy to operate. They give quality, high resolution outputs, and can be deployed fast and often.
Drones can be the best way to study animals but only if used responsibly.
In the context of accelerating geopolitical, technological and environmental change, we need to radically reassess how we perceive airspace legally.
Drones are now being used to warn beachgoers about sharks – with groundbreaking accuracy.
New research shows how smart aircraft can learn to use updrafts of warm air to stay in the sky.