Every night, under the cover of darkness, near countless small sea creatures, such as squid and krill, swim from the ocean depths to near the surface to feed. This vast animal migration, the largest on Earth and a critical part of Earth’s climate, has now been observed globally for the first time thanks to the unexpected use of a space-based laser.
The decade long study was carried out using an earth-observation satellite managed jointly by American and French national space...
source: Express