Tipping into climate catastrophe, blue whale heartbeat, thinking twice on fake news, a swift-swimming tunabot and the life of an ‘under-wolf’

Published: Nov. 29, 2019, 5:10 a.m.

Climate scientists warn we’re on the precipice of disastrous ‘tipping points’; Thar she beats! The challenge of measuring a blue whale’s pulse; Think twice about posting once — breaking the fake news cycle; Imitating a swift-swimming fish helps researchers build a speedy 'tunabot'; The triumphant life of an 'under-wolf' in Yellowstone.