激光的特性、原理和用途
What do a DVD player, supermarket scanner, printer, fiber optic internet connection, and industrial metal cutter have in common? They […]
激光的特性、原理和用途 Continue reading »
Academic
钟表运转的奥秘
Tick Tock . Tick Tock . The sounds of clocks and timepieces surround me . I’m standing inside the Willard House & Clock Museum in North Grafton, Massachusetts .
地球的山系
Mountains form some of the most spectacular landscapes in the world. In the highest mountains, huge peaks with steep sides are separated by deep valleys, cut by ice or fast-flowing rivers. Mountainous areas make up around a quarter of the land surface and are found across all continents.
基因水平转移
Genetic engineering has produced some amazing species. One type of corn has a gene from bacteria. The corn is safe for people to eat, but the plant poisons caterpillars that try to attack it.There’s also a salmon that grows to market weight in less than half the usual time of three years. It’s an Atlantic salmon with genes from a Pacific chinook salmon.
人工智能会抢走所有工作吗
Emily Hanley rubs her face, then takes a breath. “I recently lost my job to AI,” she says, in a video she shared on TikTok. She was a copywriter, or someone who writes the text for brands’ webpages, online articles, email campaigns, and other marketing materials. New generative AI tools such as OpenAI’s ChatGPT, Google’s Bard, or Baidu’s Ernie excel at generating text for all sorts of purposes, including this one. Generative AI can also write code. And it’s far cheaper than hiring a person to do the same thing. In an article for Business Insider about the ordeal, Hanley wrote, “While I and countless other out-of-work copywriters are the first wave of AI collateral, the collapse of my profession is probably just the tip of the AI iceberg. ”
人工智能会抢走所有工作吗 Continue reading »
法庭控、辩中的逻辑推理
The rule of law demands that similar cases have similar outcomes. Otherwise, the law won’t be equitable and fair. And the public won’t accept arbitrary court rulings that lack sound reasoning. So, lawyers use reasoning when they urge juries and judges to rule for their clients. And judges must use logic to explain their decisions.
法庭控、辩中的逻辑推理 Continue reading »
关于衰老，动物教会了我们什么
Aging is a fact of life. Even if you avoid bad accidents, injuries, and infections, you won’t stay healthy forever. Your body will break down as you get older. You’ll get wrinkles and achy joints. Your vision and hearing will fade. Your chance of developing cancer, heart disease, and many other ailments will greatly increase. Aging “bedevils us all,” writes Steven N. Austad in his book, Methuselah’s Zoo. He defines aging as “the progressive deterioration over time of bodily functions and defenses along with increasing susceptibility to diseases.”
关于衰老，动物教会了我们什么 Continue reading »
时间的开始与结束
No stars . No planets . Not even any atoms . At the moment of its birth, the universe was emptiness. Then, in a burst of inflation—a bit like a balloon blowing up—a very tiny area grew much, much larger. This happened when the age of the universe was just “a trillionth of a trillionth of a trillionth of a second”, says Alexei Filippenko. He’s an astronomer at the University of California, Berkeley. The dramatic period is extremely brief. During inflation, the universe’s size doubled around at least 100 times.
基因编辑技术—合成生物学的基本工具
Inside a living cell, something remarkable is happening. A very tiny machine cuts the cell’s DNA. Next, the cell repairs the broken DNA, but the segment where the cut happened no longer works the same way. The tiny machine has edited the DNA—the code of life.
基因编辑技术—合成生物学的基本工具 Continue reading »