![Meet the world’s roundest object. It’s the perfect sphere and it’s absolutely flawless. The sphere is made out of a single crystal of silicon-28 atoms.(Photo/Sipaphoto)](http://www.ecns.cn/hd/2019/05/21/b9f08141db054aa3bdecf92cae262b8b.jpg)
Meet the world’s roundest object. It’s the perfect sphere and it’s absolutely flawless. The sphere is made out of a single crystal of silicon-28 atoms.(Photo/Sipaphoto)
![Meet the world’s roundest object. It’s the perfect sphere and it’s absolutely flawless. The sphere is made out of a single crystal of silicon-28 atoms.(Photo/Sipaphoto)](http://www.ecns.cn/hd/2019/05/21/770ef02f22fa4399a6659d177a2abdac.jpg)
Meet the world’s roundest object. It’s the perfect sphere and it’s absolutely flawless. The sphere is made out of a single crystal of silicon-28 atoms.(Photo/Sipaphoto)
![Meet the world’s roundest object. It’s the perfect sphere and it’s absolutely flawless. The sphere is made out of a single crystal of silicon-28 atoms.(Photo/Sipaphoto)](http://www.ecns.cn/hd/2019/05/21/815a2c7d8a1c46b58fec87b3553a4bee.jpg)
Meet the world’s roundest object. It’s the perfect sphere and it’s absolutely flawless. The sphere is made out of a single crystal of silicon-28 atoms.(Photo/Sipaphoto)