NASA Spots a Massive Pink Heart in Argentina from Space Nearly 10 Kilometers Across. Its Color Has a Much Darker Origin than Romance
The Daily Galaxy • • science
Key Points:
- An astronaut aboard the International Space Station captured a near-perfect pink heart-shaped image of Salinas Las Barrancas, a shallow salt basin in Argentina, caused by microorganisms reacting to intense sunlight and high salinity.
- The pink coloration is due to Dunaliella salina algae producing beta-carotene pigments as a protective response to extreme light and salt stress, visible from space.
- As salinity increases further, Dunaliella populations decline and halophilic archaea and bacteria proliferate, deepening the reddish hue of the basin through their own pigments.
- Salinas Las Barrancas is an active salt extraction site producing up to 300,000 metric tons annually, while surrounding salt-tolerant plants and flamingos benefit from the carotenoid-rich environment, linking diet to the birds' pink coloration.
- The basin’s color and shape fluctuate seasonally with rainfall and evaporation, providing valuable data for researchers monitoring water movement and ecological changes in this dry landscape.
