在线英语听力室_免费在线英语听力学习网站

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.

It’s the time of year to take a look back—and that’s just what the journal Science did as they listed their most important breakthroughs of 2008. At the very top of their list: reprogramming cells. Scientists were able to successfully transform cells from ill patients into stem cells. This is important in understanding exactly how cells develop, and it could be a crucial step in finding a way to treat disease by using a patient’s own cells.

A few other top achievements of 2008:

-For the first time, scientists have been able to actually see planets orbiting a distant star.
-A team discovered a catalyst¹ that can facilitate using electricity to split water into hydrogen for a fuel cell.

-An entirely² new family of high-temperature superconductors was discovered.

-And there’s been a genome sequencing bonanza³, as new techniques make the process faster and cheaper. Mitochondrial genomes sequenced this year include extinct cave bears and most of a wooly⁴ mammoth⁵. Not to mention a first draft of the full DNA⁶ sequence of a Neanderthal. Their genome sequence could explain why they never could sequence genomes.

Thanks for the minute for Scientific American's 60-Second Science. I'm Cynthia Graber.