In the Norwegian valley town of Rjukan, giant mirrors have been erected to reflect the sun into the town's main square, which is normally into darkness in October. The idea was first thought up a century ago.
Scorpions have a bad reputation. Namibian scorpion researcher Martin Handjaba says it's unjustified. He tells DW about their painful stings, why they glow under UV light and why we shouldn't kill them.
Rainbows aren't just pretty, they're also cool examples of science at work, a symbol for the LGBT movement and - as some believe - a bridge to the world of the Norse gods.
A shrinking population and tighter household budgets mean that operators of short-stay hotels for amorous couples need to provide new experiences and seek out a new generation of clients. Julian Ryall reports.
Gravitational waves were first detected on Earth. But soon the search continues in space. This Tuesday the satellite LISA Pathfinder will be switched off. Her data will live on in a new experiment.
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