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Pleco, the world?s lightest autonomous waterless solar panel cleaning robot. The robot is specifically designed to handle the unique safety and efficiency challenges involved in cleaning C&I installations.

Technology

Solar panel cleaning robot can be dropped off and picked up by drone

Dirty solar panels reduce global solar energy output as much as 5 per cent, but a start-up in Israel has tested drone delivery of a new autonomous robot to clean rooftop arrays

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Cropped shot of an unrecognisable man sitting alone at home and suffering from arthritis in his hands - stock photo

Health

Vagus nerve receptors may be key to controlling inflammation

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A factory will soon start making green food from air and electricity

Environment

A factory will soon start making green food from air and electricity

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An illustration of neurons

Health

Stimulating the vagus nerve may reduce symptoms of multiple sclerosis

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alzheimer's disease on MRI; Shutterstock ID 677115010; purchase_order: -; job: -; client: -; other: -

Health

Acid produced by the brain could drive disease-related psychosis

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Couple in bed

Health

Vaginal immune activity increases after having sex for the first time

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The Zephyr solar plane made by Airbus

Technology

Why the US military could replace spy satellites with solar planes

Analysis

Banning solar plants on farmland in England would be a grave error

Environment

Banning solar plants on farmland in England would be a grave error

Comment

Orange bottles on an orange background

Health

The truth about the foods said to boost your immune system

Features

Illustration of a B cell producing antibodies

Health

Vaccines that prolong the immune response may give better protection

Most vaccines are designed to provoke a quick immune response, but a longer one might allow the most effective immune cells to stick around in the bone marrow

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Space

Hayabusa 2 has brought back gases from an asteroid for the first time

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Space

Astronomers found a weird asteroid closer to the sun than any other

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Space

A long-lost rogue planet could explain unexpectedly distant asteroids

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Space

NASA’s Juno spacecraft takes closest images of Europa for 20 years

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