内容摘要：The UK as a whole has clocked 636.8 hours of sunshine in spring this year, beating the 626 hours set in 2020.

The UK as a whole has clocked 636.8 hours of sunshine in spring this year, beating the 626 hours set in 2020.

released in February by tech data platform Dealroom, in collaboration with the Nato Innovation Fund, an independent venture capital fund launched in 2023 with funding from 24 Nato allies.Varjo says its headsets are being used to provide 80 simulation programmes to Nato forces in the US and Europe.

In simple terms, its products are more advanced versions of the virtual reality headsets used in gaming.But they combine synthetic artificial content with views of real-world environments.This "mixed reality" experience "squeezes the training continuum" for fighter pilots, says the firm's CEO Timo Toikkanen, because they no longer have to travel long distances to complete war simulations in giant aircraft hangers, which are expensive to power and run. "You can do 99% of the same [training] inside of the headset."

The start-up had already attracted heavy investment prior to Russia's invasion of Ukraine, and started working with medical research companies and car manufacturers.But Mr Toikkanen says the start of the conflict and Finland's admission to Nato a year later "just kind of put everything on steroids" in terms of interest in its defence offering.

Since March 2022 the company has raised more than €50m (£42m; $54m) in additional funding.

Mr Toikkanen says that before the war technologies that could be used by military forces used to be "kind of a red flag" for investors concerned about social and environmental responsibilities, and Varjo's executives would "tiptoe around" that side of the business when seeking funding.Cats spent significantly more time sniffing the odours of unknown people compared to those of their owner or the empty tube, suggesting they can discriminate between the smells of familiar and unfamiliar people, the researchers said.

The idea of sniffing an unknown stimulus for longer has been shown before in cats - weaned kittens sniff unknown female cats for longer compared to their mothers.However, the researchers cautioned that it cannot be concluded the cats can identify specific people such as their owner.

"The odour stimuli used in this study were only those of known and unknown persons," said one of the study's authors, Hidehiko Uchiyama."Behavioural experiments in which cats are presented with multiple known-person odour stimuli would be needed, and we would need to find specific behavioural patterns in cats that appear only in response to the owner's odour."