Based on the nanostructure of the sea urchin spines, a German research team has developed cement that is significantly more fracture-resistant than anything that has been developed thus far, provides us with completely new construction possibilities. A. Picker et al., Science Advances, Vol. 3, November 29, 2017 The manufacturing of concrete generates about 4.5 % of the world's human-induced carbon dioxide emissions. Four cardenolides, isolated from the widely distributed plant oleander, showed a strong inhibitory activity against barnacle settlement. Investigation of three oleander extracts by ...