Surprising differences that may be found on other planets highlight fundamental difficulties in defining life
Richard Bisley/Science Photo Library
alien earth
Lisa Kaltenegger (Allen Lane (UK) St. Martin’s Press (USA))
A planet whose year is only one week long as it orbits its star 70 times faster than the fastest fighter jet. A scorched, Earth-sized world with two suns, where rock melts into lava, evaporates and falls as rain. A planet whose surface is covered by a vast deep ocean. In some places, the sun never sets unless you go far away…
Source: www.newscientist.com
