'Earth is in our hands': Astronaut Pesquet's plea for the planet

From his unique viewpoint hundreds of kilometres above Earth, French astronaut Thomas Pesquet told AFP he felt helpless watching fires rage across the planet below, calling for more to be done to protect this fragile "island ...

How do we know that time exists?

The alarm goes off in the morning. You catch your morning train to the office. You take a lunch break. You catch your evening train back. You go for an hour's run. Eat dinner. Go to bed. Repeat. Birthdays are celebrated, ...

Using holograms to illuminate de Sitter space

Our understanding of the universe may not be expanding as much as the universe itself. In some cases, our theories about cosmic inflation may feel as if they are deflating into a black hole.

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