carbon dioxide into the atmosphere(along with pollutants such as sulfur and nitrogen compounds that also act as heat traps, and that are dangerous to the lungs as well.)Natural gas, when burned, produces less carbon dioxide than coal and oil do, and hydrogen, when used as a fuel, produces no carbon dioxide at all. Even nuclear energy is to be preferred to coal and oil, in my opinion. Nuclear ...
위험을 배제하고 안전하게 저장하기 위해 2가지 방법이 거론되고 있다. 이온 덫(ion trap)을 만들어 반물질을 잡아두거나, 초전도체를 활용하는 방법이다. 그런데 반물질을 가둬두려면 반물질로 하여금 전하를 띠게 해야 한다. "그러나 전하를 갖게 되면 같은 전하끼리는 서로 밀어내게 된다. 따라서 ...
Indeed, feathers might not have evolved for the purpose of flight to begin with but as a sort of "net" with which to trap insects. Their use for flight and as an insulating device would develop as secondary purposes later.The English astronomer Fred Hoyle, along with two associates, claimed in 1985, however, that archeopteryx was merely a primitive lizard and that once the fossil had been ...