rom big advances in reading ancient DNA to gene-editing innovations, from bold exploration of our solar system to tiny medical devices good enough to eat, 2019 is shaping up to be a breakthrough year in science. We sum up the latest developments, share the most memorable images, and look further afield at what’s coming next. iENVIRONMENT & CLIMATE P. 32 iGENETICS P. 36 iHUMAN ORIGINS P. 40 iFLORA & FAUNA P. 44 iSPACE P. 48 iARCHAEOLOGY P. 54 iMATH P. 58 iMEDICINE P. 60 iPALEONTOLOGY P. 64 iNEUROSCIENCE P. 68 iPOLICY P. 74 iCHEMISTRY & PHYSICS P. 80 iTECH P. 82 Illustration by Dan Bishop/Discover, Shutterstock elements by Ievgenii Meyer,