01 / 5 · TED-Ed
Fresh water grew scarce and lakes likely grew saltier and became treacherous traps.
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But for humans living near the Sun-scarce poles, it’s harder to get enough UV light to make vitamin D year-round.
These postcards tell us if this world is dangerous or safe, if food is plentiful or scarce.
Which means, just like the body, the original tumour suddenly becomes an enemy, fighting for the same scarce nutrients and resources.
Ash, debris and the burned remains of the formerly lush and blooming life cover the ground, the sky is dark and it is cold and fresh food is scarce, while fungi thrive.
Hearish brings a word back in new clips, from new speakers, until it sticks. Save this one and start with it.