分类目录归档：system
power that is the word that comes to
mind we're the new technologists we have
a lot of data so we have a lot of power
how much power do we have seen from a
movie Apocalypse Now great movie we got
to g
hello my name is Bert Baer and I'm 11
years old I came here today to talk
about what's wrong with our food system
first of all I would like to say that
I'm really amazed how easily kids rolla
to belie
Every chicken was once an egg,
every oak tree an acorn,
every frog a tadpole.
The patch of mold on that old piece of bread
in the back of your fridge,
not so long ago that was one, solitary cell.
Even
What does the French Revolution
have to do with the time NASA accidentally crashed a $200 million orbiter
into the surface of Mars?
Actually, everything.
That crash happened due to an error
in convert
One, two, three, four, five, six, seven, eight, nine, and zero.
With just these ten symbols, we can write any rational number imaginable.
But why these particular symbols?
Why ten of them?
And why do
Each time you take a step,
200 muscles work in unison to lift your foot,
propel it forward,
and set it down.
It's just one of the many thousands of tasks performed by the muscular system.
This network
Across the whole planet,
humans eat on average between one and 2.7 kilograms of food a day.
That's over 365 kilograms a year per person,
and more than 28,800 kilograms over the course of a lifetime.
In the grasslands of Mauritania,
a gazelle suffering from tuberculosis takes its last breath.
Collapsing near a small pool,
the animal’s corpse threatens to infect the water.
But for the desert’s cl
Imagine we want to build a new space port
at one of four recently settled Martian bases,
and are holding a vote to determine its location.
Of the hundred colonists on Mars, 42 live on West Base, 26
Since 2000, the annual number of people convicted of crimes in the United States
has stayed steady, but the average number of people in jail each year has shot up.
How can that be?
The answer lies in