BRIDGE THE GAP Land crossings may have allowed dinosaurs (such as Supersaurus, shown in this artist’s illustration), lizards and early mammals to migrate across the Atlantic Ocean around 150 million years ago, one researcher proposes.
MICROBE MADE Odd underwater formations near the Greek island of Zakynthos are the millions-of-years-old remains of natural hydrocarbon vents, not a lost Greek city.
University of Athens
FALLOUT FORENSICS A new technique allowed researchers to accurately estimate the energy release from the 1945 Trinity nuclear test in New Mexico (shown). The method could help regulators enforce nonproliferation treaties, the researchers say.