It is believed that matter, motion, gravity, and everything else we know of originated from the three dimensions of space and one of time. However, a new idea challenges this theory, suggesting that ...

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Photonic space-time crystals are materials that could increase the performance and efficiency of wireless communication or laser technologies. They feature a periodic arrangement of special materials ...

Cosmology is in crisis. The pillars of science’s most successful model of how the universe formed – and where it is heading – are starting to crack. One of those pillars is dark energy, a mysterious ...