Blue jets, red sprites and other flashes | | In recent years, the International Space Station has given astronauts the chance to photograph transient luminous events - or TLEs - natural light shows produced at the tops of thunderstorms. | | |
How the universe creates gold | | Finally, scientists know how the universe makes gold. They've seen it created in the cosmic fire of 2 colliding stars via the gravitational wave they emitted. | | |
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