Really brief.

The SLAC National Accelerator Laboratory in California has produced the most powerful burst of X-rays ever reported, packing nearly a terawatt of power in just 440 billionths of a billionth of a second. A new compound containing the rare element promethium has been created, revealing its bond length with oxygen atoms. Additionally, a small mushroom native to Chile's mountains, the big puma fungus, has been rediscovered after more than 40 years since its last sighting in 1982. [Extracted from the article]