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<p>Experimental evidence of the bending of heat to desired purpose, in analogy to that of light,
through designed placement and orientation of nominally isotropic material is presented. This was
done by inducing anisotropy in an effective thermal medium through off-diagonal components in
the thermal conductivity tensor. An upward or downward heat flux bending of up to +/- 26°, in close
agreement with theoretical estimates, was obtained in a metamaterial constituted from thin, stacked
layers of copper and stainless steel. Transient observations of heat flow indicate anisotropic energy
transport hinging on the relative differences between the elements of the thermal diffusivity tensor. </p>
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