Cetaceans minimize time at the surface to maximize time spent swimming and diving. How do they obtain enough oxygen during a single inhalation to remain underwater for up to 90 minutes?

human-caused climate hope this

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.