Humans, on the other hand, have existed for far less than one million years. But in spite of their prevalence, dinosaurs became extinct about 60 million years ago. Dinosaur Extinction: Waiting for Impact One compelling theory about the extinction of the dinosaurs is a massive asteroid impact....
4. True or false: Humans are symbiotes. True. The human digestive tract contains trillions of bacteria and other microorganisms. These bacteria serve a number of functions, but they primarily break down things that our digestive system cannot process by itself. Read More: How a Symbiotic Relatio...
好奇) how the local people and wildlife could co-exist peacefully in such an area.(根据汉语提示完成句子) 相关知识点: 试题来源: 解析 are##were curious about 【详解】 考查固定短语,时态和主谓一致。句意:科学家们很好奇当地居民和野生动物是如何在这样一个地区和平共处的。“对……好奇”是固定...
也就说,类比的时候,要用能让对方产生同感的例子。内容摘录Emotions and logic do not have to be enemies. Logic works perfectly in the abstract mathematical world, but life is more complicated than that. Life involves humans, and humans have emotions. Here in this beautiful and messy world of ours...
After all, many of us humans like to have one right answer. But Einstein paved the way in 1905 by embracing wave-particle duality. We've already discussed the photoelectric effect, which led Einstein to describe light as a photon. Later that year, however, he added a twist to the story...
the most help - from a human teacher - to keep up with their learning.Besides,poor and unequal schooling,leaving too many children behind,is one of the deepest roots of inequality and low productivity.If AI can help target existing teaching resources better,the benefits could...
And that was just the first spacecraft of many to orbit, flyby and even land on the Martian surface. So what have scientists learned about Mars from the data gleaned from these missions? And when might the machines on Mars get human company? Will humans ever set foot on the Red Planet...
Introduction It's been more than two years and we are still living in the shadow of Covid-19. There have been many pandemics through history, such as the Black Death, and our species has survived. Sam and Neil discuss how pandemics end, and ...
The Many-Worlds theory also certainly contradicts the idea of Occam's razor, that the simplest explanation is usually the correct one. Even stranger is the implication by the Many-Worlds theory that time doesn't exist in a coherent, linear motion. Instead, it moves in jumps and starts, exi...
Many uncontacted tribes still exist. Where are they, and why do they occasionally reach out to the rest of the world?