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Most of these wandering species are normally invisible. Viviane Richter reports.
Astronomers glimpse a galactic ghost
A look at the building blocks of matter.
What caused Earth's first five mass extinctions?
High-speed photography captures an unseen world.
A look at some of the places life might be found in our solar system.
Stem cells close up.
Images from the mysterious Arctic craters.
The Robotics Challenge is a rescue-robot octathlon – eight tests of the skill, strength and dexterit
Cellular landscapes of the mechanics of infection.
How insects put their extra pairs of wings to good and varied uses.
From hitchhiking anemones to fungus-farming ants, here are eight examples of symbiosis in nature.
Brilliant colour that comes from nanoscale structures.
Scientists want to study the mysterious ultra-high-energy particles arriving from deep space.
Astronomers thought our galaxy, the Milky Way, was a relatively peaceful place until they began to l
Revealing them required something far more sophisticated than tinkering with bones.
Helping seed coral regrowth in tropical waters.
A snapshot of natural light pollution and our galaxy.