From veteran strikers to exciting young talents, here are 10 signings who could prove to be bargains for their new teams Even in this era of relentless transfer inflation, a fee of more than £20m does not usually represent a bargain. Roma’s move for the Porto playmaker Mora may b
Sherman’s March director McElwee revisits footage of his late son for this magnificently affecting film and meditation on making art This new film from revered documentary-maker Ross McElwee is an extraordinary work, arguably his most audacious use yet of autobiographical materia
中新网北京9月21日电 (记者 孙自法)高能宇宙线的起源、加速和传播问题，被称为天体物理学的“百年谜题”，一直以来备受关注。 42光年X射线尾迹 中国天关卫星(爱因斯坦探针，英文缩写EP)、高海拔宇宙线观测站(英文缩写LHAASO，中文昵称“拉索”)最近强强联手，“双剑合璧”观测到宇宙中一条长达42光年的超长X射线尾迹——也是目前已知最长的X射线脉冲星风云尾迹，让科学家们得以追踪宇宙高能粒子在星际空间中的漫长旅程。 天关卫星。天关卫星团队 供图 被戏称为“揪出狐狸尾巴”的该超长X射线尾迹，发现于一颗距离地球约4600光年的脉冲星周围，尾迹延伸约42光年，
