A triple bacon cheeseburger seems like a heart attack on a plate.
So how can polar bears thrive on their version, seal blubber?
Turns out they've stocked up on genes that let them clear fats from their blood.
That's according to a study in the journal Cell.
Polar bears are well adapted to life on the sea ice.
Up to half their body weight's fat, which gives them extra insulation and buoyancy, and provides them with a ready source of energy.
But how can an animal so fat also be so fit?
Researchers compared the genomes of polar bears with those of brown bears, and found that polar bears have accumulated genetic changes that boost their heart health and fat metabolism.
One gene in particular, called ApoB, helps move cholesterol out of the blood—where it causes problems in humans—and into cells.
These genomic changes happened quickly, evolutionarily speaking.
Polar bears and brown bears diverged from a common ancestor less than half a million years ago.
But if that seems super speedy, the ability to digest lactose didn't spread through human populations until we domesticated cows, just 10,000 years ago.
A moooving testament to the power of natural selection.
1.heart attack n.心力衰竭，心脏病发作
I think we solved the mystery of the heart attack.
Grandpa had another heart attack.
2.stock up 储足
With the stock up more than 200% during his tenure, he certainly did his job!
Filling his tank for the last time, he went inside to stock up.
3.according to 根据，按照；据…所说
All firsts in a car, according to gm.
According to weiner, product teams will continue to crank.
4.compare with 与…相比；比得上
Life isn't fair-don't compare with or be jealous of others.
Atheists have precious little to compare with this.