Often dubbed the unicorns of the sea, narwhals are strange and beautiful creatures with long tusks protruding from their heads. Members of the population of more than 80,000 can weigh up to 4,200 ...

Global mean sea level change (in cm) from 1900 to 2019 reconstructed with tide gauges from CSIRO (blue line), Palmer et al. (2021; red line) and global mean sea level based on satellite altimetry ...