Star Spiders

Solar cells made with bismuth vanadate achieve a surface area of 32 square meters per gram.  This compound can be paired with cheap oxides to split water molecules (and make hydrogen) with record efficiency. Short-term geoengineering could postpone global warming, only to have it happen more quickly in the future. Carotenoids tinge blackbird bills a deep orange, signalling fitness; birds with oranger bills are "are heavier and larger, have less blood parasites and pair with females in better condition than males with yellow bills." Fibroblasts can extrude a tidy biological scaffold for stem-…