新聞集錦
Leaf-Eared Mouse Becomes Highest-Dwelling Vertebrate
Scientists have recently discovered a species of mice living close to the top of Llullaillaco, a volcano on the border between Chile and Argentina. Living at an altitude of just over 6,700 meters, the leaf-eared mice are now considered the highest-dwelling vertebrate species.
Scientists initially assumed that this environment would be too difficult to support animal life because oxygen levels are only about 40% of those at sea level, and temperatures regularly drop far below zero degrees Celsius. Furthermore, the mice were found 650 meters above the volcano's vegetation line, leading researchers to wonder about their food supply. Therefore, when the first mouse was discovered near the peak, scientists assumed it might have accidentally hitchhiked with local people traveling through the area. Subsequent findings of other mice in the region clarified that these rodents were not accidental visitors, but rather were thriving in this extreme environment.
What Did You Learn ?
There are some theories about why the dinosaurs were wiped out.
關於恐龍被徹底消滅的原因有一些理論。
A vast quantity of water was needed for the irrigation project.
灌溉工程需要大量的水。