How smart are crows? - Katharina Brecht
Learning Stats
CEFR 等级
Total Words
Unique Words
难度
字幕 (75 segments)
DownloadIn one of Aesop’s 2,500-year-old fables, a crow is searching for water.
It spies a pitcher and discovers liquid inside—
but it's beyond reach.
Soon, the crow begins dropping pebbles into the pitcher.
One by one, they displace the water, and the crow quenches its thirst.
Interestingly, this fable turns out to be pretty accurate.
In a 2014 experiment,
scientists placed a food reward in a tube partially filled with water
Full subtitles available in the video player
Key Vocabulary (16)
Used to refer to the person or people that the speaker is addressing. It is the second-person pronoun used for both singular and plural subjects and objects.
edible substance
"The food is good."
H2O liquid
"Drink water daily."
unlike
"Different colors."
To hit someone very hard on the head, typically with a heavy or blunt object. It is a graphic and often informal verb used to describe a violent strike to the skull.
A scientific test done to find out how something works or to see if an idea is true. It is a common activity in science classes where students follow steps to observe a result.
"The experiment is important."
In sports like baseball or softball, a pitcher is the player who throws the ball toward the batter to start each play. The pitcher stands on a specific area called the mound and tries to prevent the batter from hitting the ball.
"The pitcher is important."
Grammar in This Video
"It spies a pitcher and discovers liquid inside"
"a crow is searching for water"
"family of songbirds that includes crows, ravens, jays, and magpies"
"the jays not only recalled where they buried things"
"Crows also tend to gather around the bodies of their dead companions"
"Some Japanese crows have been observed placing nuts on the road"
"If they wore a different mask, however, they were ignored"
"Some Japanese crows have been observed placing nuts on the road"
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