Nu se pretează? Nu contează! La noi puteți returna bunurile în 30 de zile
Cu un voucher cadou nu veți da greș. În schimbul voucherului, destinatarul își poate alege orice din oferta noastră.
30 de zile pentru retur bunuri
A book of spatial thought experiments by the author, with physics. Heavy reading. This is by a man who is trying to figure out his own universe. There is also a condensed version called "The Origin of All Forces." "The Origin of All forces" contains some updated theories as well as some new ones.