Karina Shah
Karina Shah
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A quarter of all known bee species haven't been seen since the 1990s

A quarter of all known bee species haven't been seen since the 1990s

×The number of bee species recorded worldwide has been sharply decreasing since the 1990s.Eduardo Zattara and Marcelo Aizen at the National University of Comahue in Argentina analysed how many wild bee species are observed each year as recorded in the Global Biodiversity Information Facility – a publicly available platform where researchers and citizens can record sightings of bee species.They found that there were a quarter fewer species reported between 2006 and 2015, as compared with the records we have from before 1990.AdvertisementThe decline is especially alarming considering the...

newscientist.com
Karina Shah
2d ago
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Chemical that makes chilli peppers spicy boosts solar panel cells

Chemical that makes chilli peppers spicy boosts solar panel cells

×Solar cells treated with capsaicin – the compound that makes chilli peppers hot – have been found to be more efficient at converting solar energy.Ultrathin solar cells made with lead-based materials can absorb light than silicon-based solar cells, but they often can’t convert energy as efficiently because they lose some of it to heat. Turns out, the solution is to add a bit of heat.Qinye Bao and his colleagues at East China Normal University in Shanghai added capsaicin to these ultrathin perovskite solar cells during the manufacturing process. Bao and his team suspected that capsaicin...

newscientist.com
Karina Shah
Jan 14
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This touch-sensitive glove is made from stretchy optical fibres

This touch-sensitive glove is made from stretchy optical fibres

×A touch-sensitive glove made from stretchable fibre-optic sensors could be used in robotics, sport and medicine. “We made a sensor that can sense haptic interactions, in the same way that our own skin sensors interact with [the] environment,” says Hedan Bai at Cornell University in Ithaca, New York.Bai and her team created the glove using optical fibres made from thin elastomeric polyurethane cables that transmit light from an LED. The light is interrupted when the cables are bent, stretched or put under pressure.AdvertisementThe team dyed parts of the fibres with different colours,...

newscientist.com
Karina Shah
Nov 17
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Watch Samsung's prototype holographic video screen in action

Watch Samsung's prototype holographic video screen in action

×A holographic display developed by researchers at Samsung allows high-resolution 3D videos to be viewed from a variety of angles and could be made thin enough to be incorporated into a smartphone.“The holographic display delivers the most realistic visual representation of our reality,” says Hong-Seok Lee at Samsung Advanced Institute of Technology in South Korea. “We show the first working system of slim holographic display.”Holographic displays manipulate light beams to produce a virtual 3D image in space, without requiring any special glasses or external equipment.Advertisementcan only...

newscientist.com
Karina Shah
Nov 17
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Arctic animals are migrating earlier in the year due to climate change

Arctic animals are migrating earlier in the year due to climate change

×Animals in the Arctic, including reindeer and golden eagles, are migrating earlier due to climate change, say researchers who have gathered a huge amount of data to study the behaviour of 86 Arctic species over the past three decades.“We have the ability to monitor animal movements on a very large scale,” says Eliezer Gurarie at the University of Maryland. “It seems that animals are unknowingly responding and adapting to climatic changes, and have been doing for years.”Gurarie and his team used GPS tags and satellites to track the spring migration of more than 900 female reindeer over the...

newscientist.com
Karina Shah
Nov 9
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