The Drake Equation: Estimating the Prevalence of Extraterrestrial Life through the Ages
1发布于 2022-04-19
The Drake Equation: Estimating the Prevalence of Extraterrestrial Life through the Ages Authors: Vakoch, Douglas A.; Dowd, Matthew F. Get th...
标签：Extraterrestrial beings
Star Girl
1发布于 2022-01-16
Star Girl Authors: Winterfeld, Henry; Wegner, Fritz; Schabert, Kyrill Get this book Contact Email: girro@qq.com Publisher: Dover Publication...