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.
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 »
Young people’s bodies change during adolescence. Their thinking and reasoning skills change. And their relationships with others change as well. Changes in relationships are a normal and natural part of growing up. Yet those relationships can sometimes be confusing.
An old adage holds that beauty is in the eye of the beholder. The saying refers to the subjective nature of beauty. What one person finds beautiful might not appeal to someone else.
The next big thing in nuclear energy is small. Designs for dozens of small modular reactors have been developed or are in progress . And a few small reactors are already operating in India, Pakistan, Russia, and elsewhere. A small modular reactor can produce up to 300 megawatts (MW) of electricity (many designs produce much less). But size isn’t the only thing that makes these new, advanced reactor designs stand out.
Carnegie Hall in New York City ha d been f a mous f or it s wa r m,resonant sound since it opened in 1891. After ninety years, however, the hall needed a major makeover. When it reopened in late 1986, something was wrong. Musicians said the sound was harsh, hollow, brittle, and dead.The hall tried several fixes, but nothing worked. Nine years later, the mystery was solved. Somehow during the renovation, concrete had been laid under the wooden stage floor. That had dulled the sound, especially the bass notes. In a concert hall, even unseen det ails can make a huge difference.
Bravo for Concert Hall Acoustics Continue reading »
Places where life can thrive vary widely on planet Earth. Scientists find the greatest diversity in rainforests with abundant water and mild year-round temperatures.
In contrast to Earth, somewhere like Mars seems like a bleak wasteland. With an atmosphere that’s about 100 times thinner than Earth’s, the planet surface can’t hold in heat well. A summer day at the Martian equator might get up to 20℃ at noon
生命可能在哪些环境下生存？ Continue reading »
Etiquette provides basic rules for how we interact with other people. And good manners help us make a good impression. Two ver successful flms exemplify the stor of how learning manners changes a person. One is the flmMy Fair Lady, which won the Academy Award for Best Picture in 1964. It is set in early twentieth-centur England.
Social Etiquette: One of the Arts for Building Successful Relationships Continue reading »
