What do you know that most people don’t?

1. Warning: Don’t imitate. Don’t
microwave two grapes next to each other, or you will lose your house. In less
than 8 seconds, the point  two grapes
touching each other, will form a high-temperature plasma, ejecting a blazing
flame.

2. Hippos graze on the land and
then run to the river to poop.
A study in southwestern Kenya showed that, Hippos
can deliver up to 0.4 tons of silicon to the Mala river every day. This silicon
is essential for the growth and reproduction of diatoms, which are important
producers of water and the basis of the food chain. If the hippopotamus population
decreases, the entire ecosystem may be affected. While of course, it’s also not
good if Hippo poop too much: it can suffocate fish.

3. Pandas have a high protein diet. Chinese researchers
tracked the food leftovers of wild pandas and analyzed the nutritional
composition of them. They found that about 50% of the energy source of  pandas’ diet is protein. This ratio is similar
to that of carnivores, but much higher than that of herbivores.

4.Are plastic bags labeled
“biodegradable” really environmentally friendly?
A British study
questioned this. The researchers collected five kinds of plastic bags commonly
used in local retail stores and exposed them to outdoor, soil and marine environments
for three years. Surprisingly, after three years in the soil or marine
environment, the “biodegradable” plastic bag samples still failed to
degrade, and they could even continue to hold things, as shown in this photo.

5. There
are also rich expressions on the mouse’s face.
Like humans, mice have facial
expressions that reflect different emotions. Although these expressions may
seem illegible to ordinary people, scientists have now learned to read them.

Quiz time: The mouse at the top of the picture is in a neutral emotional state. Can you see what kind of inner activity is reflected by the expression of the mouse at the bottom?

6. For more than a
hundred years, the “standard body temperature” of people seems to be
falling slowly.
We still don’t know why. The standard temperature
recorded in the 19th century literature is 37 ℃, but now people’s
temperature is generally lower than this number.

7. The Antarctic pole is the most
remote place on earth, but also one of the fastest warming areas. The study
points out that in the past 30 years, the rate of Antarctic warming is three
times the global average, and the average increase of 0.6 ℃ every 10 years.
Elsewhere on earth, the rise rate is 0.2 ℃ every 10 years.

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