麻豆传媒

Earth

No laughing matter聽| Helium's essential for party balloons, but also for MRI scanners, physics experiments and space rockets. But supplies on Earth are getting dangerously low, warns Chanda Prescod-Weinstein

Cosmic microwave background is a sea of radiation that provides us with evidence for the big bang.聽 The big bang is now orthodoxy, although without a theory than unifies general relativity with quantum theory, we鈥檙e stuck in explaining exactly what it was or why it happened.

Physics

Physics

Health