Ntau yam khoom hauv peb lub neej niaj hnub muaj cov cuab yeej ntawm kev nyiam cov hlau nplaum, nrog rau cov hlau nplaum sib nqus. Yog li, dab tsi yog qhov zais cia tom qab sib nqus cib, thiab vim li cas lawv thiaj nyiam cov hlau nplaum? Cov lus teb yog nyob rau hauv lawv cov muaj pes tsawg leeg. Magnetic bricks muaj ib feem ntawm cov khoom sib nqus, xws li hlau, cobalt, thiab npib tsib xee. Cov ntaub ntawv no tuaj yeem ua tau hlau nplaum nyob rau hauv lub zog ntawm cov hlau nplaum, yog li cuam tshuam nrog cov hlau nplaum. Thaum peb nqa cov hlau nplaum ze rau ntawm lub pob zeb sib nqus, cov hlau nplaum hlau nplaum ua rau cov khoom sib nqus hauv cov cib, ua rau lawv sib nqus thiab nyiam cov hlau nplaum.