German researchers claim to have developed “cyborg sperm” as a means to countering infertility, a solution that they say could be superior to current methods of in vitro fertilization. Specifically, they used “miniaturized vehicles” to guide cow sperm in order to fertilize cow eggs in the lab.

“The operation of miniaturized vehicles that perform tasks and interact with living cells inside the human body appears to be one more 20th century dream that today’s engineers finally become ready to tackle,” the researchers wrote in their study, published in the journal “Nano Letters.”