Fragrant aromas from plants can actually be a response to attacks by insects, and can alert neighbours to an attack or summon the insects’ predators. Now, scientists are deciphering these secret codes to develop better, greener chemicals to defend crops against herbivorous insects.
Delivering online shopping to people’s homes is a huge source of greenhouse gas emissions, particularly when deliveries fail and the journey needs to be repeated. Researchers are now re-thinking home deliveries to see if there is a better way of doing things, with ideas including robot couriers, jointly owned parcel lockers and an ‘Uber’ for parcels.
The brown bear is one of Europe’s five large carnivores and can sometimes cross paths with people, with potentially fatal consequences. But bears have different personalities and behaviours, say researchers, and understanding this is the key to reducing conflict and protecting both them and humans.
A fine layer of dust thought to have been left by the first winter monsoon ever to cross northeastern Tibet has been uncovered by scientists, revealing the moment when the great weather phenomenon that waters much of Asia’s summers and dries its winters may have begun.
Across Europe’s cities, the demand for delivery services is increasing. But these deliveries affect urban life as they add to traffic congestion, noise and pollution and many cities are now trying out alternative modes of transport that could help.
The Atlantic Ocean is under threat from fishing, fossil fuel extraction and deep-sea mining, and the onus should be on these industries to prove that their exploitation is sustainable rather than requiring scientists to come up with reasons to protect it, says Professor J Murray Roberts, a marine biologist at the University of Edinburgh, UK.
When the worst floods since 1966 submerged the city of Venice in November 2019, the blame was laid on its incomplete mobile flood gates. They have been under construction since 2003 but were not ready in time to save the Italian city. But elsewhere in the Venetian lagoon, there was a different story to tell. In 1966, the coastal sides of Lido and Pellestrina islands also flooded, but this time they didn’t.
Sea ice researcher Dr Polona Itkin of UiT The Arctic University of Norway in Tromsø is currently aboard a research vessel spending one year trapped in Arctic sea ice to study climate change up close. On 20 January she spoke to Horizon from the ship, Polarstern, about working through the polar night, the shortcomings of satellite data and fending off polar bears.
Each year, more than a million wildebeest migrate across the grassy plains of the Serengeti National Park in Tanzania into Kenya’s Masai Mara National Reserve. But on the borders of these protected areas, human populations are increasing and wild ecosystems are struggling to survive in the face of development. Understanding these pressures is crucial for protecting people and wildlife, and to curb illegal activities such as poaching.
Figuring out how plants defend against pests could teach us how to better protect crops.
The number of parasites is increasing with rising sea temperatures.
Prof. J Murray Roberts is carrying out a health check on the Atlantic.