Fill-in
B1
Porque é que o céu é azul?
Why does the sky look blue to us during the day?
B2
De cima para baixo
Why does water in lakes and rivers freeze from the top down?
B1
Sem ar não há som
Space is silent because there is no air for sound waves to travel through.
B1
Impressões digitais
Learn how genes and the womb environment create unique fingerprints.
B1
Que grandes preguiçosos!
Chimpanzees are agile but spend most of their time resting and conserving energy.
B1
Porque sonhamos?
Theories about the purpose and meaning of dreams.
B1
Porque é que o céu é azul?
Why does the sky look blue to us during the day?
B1
Tons outonais
Why tree leaves change from green to red, orange, and yellow in the fall.
B1
Longevidade canina
Why small dogs usually live longer than big dogs.
B1
Sinestesia
Learn how some people uniquely blend their senses in special ways.
B1
Porque é que bocejamos?
Main scientific theories that try to explain why we yawn.
