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The deadly virus spread to 15 million Americans
Biology

The deadly virus spread to 15 million Americans

While the world is worried about the new corona virus, another virus has infected 15 million Americans across the country and killed more than 8,200 people this season.

February 9, 2020
The dangerous viruses on Earth
Biology

The dangerous viruses on Earth

Ebola, HIV, dengue, and seasonal flu viruses all have high mortality rates and are a threat to humans.

February 9, 2020
Why do crabs foam?
Animal world

Why do crabs foam?

When we buy crab, we have to choose live crab with hard shell, release a lot of white foam. What is the rule of this?

February 9, 2020