Tau neutrinos, the last neutral lepton discovered, absent in neutrino oscillation at TeVs-PeVs-EeVs atmospheric windows, may arise as the first clean signal in UHECR-neutrino associated astronomy. Their tau birth in ice may shine as a double bangs (disentangled above PeV) anisotropy. In addition UHE tau, born tangent to the Earth or mountain, while escaping in air may lead, by decay in flight, to loud, amplified well detectable tau-airshower at horizons. Tau astronomy versus UHECR are going to reveal most violent sky as the most deepest probe. First hint of Vela, the brightest and nearest gamma source, a first galactic source is rising as a UHECR triplet nearby. Cen A (the most active and nearby AGN) is apparently shining UHECR source whose clustering (almost a quarter of the event)providing a honeycomb structure comprises the step of including in the honeycomb structure a plurality of multi-sided cells. The step of providing a honeycomb structure comprises the step of including in the honeycomb structure a plurality of cylindrical cells. The step of providing the honeycomb structure comprises the step of providing a matrix of a plurality of strips attached together at cross-over points, the strips being made of an impact-resistant material. The step of providing a honeycomb structure having a plurality of cells comprises the step of providing at least one piezocomposite element having a 1-3 connectivity configuration in each of the cells. The step of providing a honeycomb structure having a plurality of cells comprises the step of providing at least one piezocomposite element having a 2-2