原文呈现Read the magazine article arguing for space exploration.名师圈点原文呈现译文参考Why we explore我们为什么探索词语积累In 1969, when Neil Armstrong1969年,当尼尔 ·阿姆斯特朗①dare to do sth.敢于做某事first landed on the Moon, many首次登陆月球时,许多人认为② a huge amount of大量的,后跟不可数...
In this highly original new book, the philosopher Markus Gabriel challenges our notion of what exists and what it means to exist. He questions the idea that there is a world that encompasses everything like a container life, the universe, and everything else. This all-inclusive being does ...
In 1969, when Neil Armstrong first landed on the Moon, many people thought that soon we would be 1 (regular) visiting other planets in our solar system and would even dare to travel beyond it. This is clearly not the case. The reality is that space exploration is extremely difficult and...
In the 1960s, humans set out to discover what the red planet has to teach us. Now, NASA is hoping to land the first humans on Mars by the 2030s.
So why does gravity pull you down and not push you away? Imagine someone went under the trampoline and pushed up. The ball would roll away! This would be a gravity hill, not a gravity well. As far as scientists know, matter – or stuff – always makes gravity wells and not gravity ...
A leap year has 366 days, one more than the usual 365. According to the Gregorian calendar, which most countries use today, a leap year happens every four years. This extra day is February 29, a date that doesn't exist( 存在)in other years. Generally, any year that can be evenly ...
As an autonomous system conserves its angular momentum, the angular momentum lost by the Earth is gained by the Sun and Moon. The Sun is so massive that the reciprocal effect on it is negligible but the Moon does, however, gain a significant amount of angular mom- entum at the expense ...
Most obviously, it really enhances the fact that our actual moon does not have a name at all. Mars' moons Phobos and Deimos have names, all the planets have names, including exoplanets that only go by their automatically generated ones, and even the sun has a name. We don't call th...
(2) The confusion of a celestial compass by the light does not match our results either8. An insect should keep a light source at a fixed visual location for maintaining its heading. Switching light position (Supplementary Fig.5) shows that insects readily hold the light source on either ...
Sep 2014 TED2014 Jim Holt: Why does the universe exist? 17:17Aug 2014 TED@NYC Jill Shargaa: Please, please, people. Let's put the 'awe' back in 'awesome' 06:13Aug 2014 TED@NYC Sally Kohn: Don't like clickbait? Don't click 04:36Aug 2014 TEDxHousesOfParliament Meera Vijayann: ...