Advanced Engineering Materials
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Front Cover Advanced Materials 3/2012
The cover shows some siliceous sponge spicules, like the 30μm spheroidal asters from the demosponge Geodia cydonium, which are composed of an array of a vast number of small rod-like pillars that fused (bio-sintered) together to the porous sphere. More details can be found in the article by W.E.G. Müller et al. on page B4.