The riders stopped in front of an enormous rock and then the leader of these riders shouted, "Open _____." Suddenly the rock moved to reveal the entrance to a cave.
-- integumentary, gland, epidermis, epidermal, hypodermis, dermis, follicle, acne, subcutaneous, dilate, homeostasis, melanocyte, sebaceous, keratin, melanin
NASA Astronauts Make Historic Splashdown In SpaceX Capsule
It's known that the coronaviruses circulate in a range of animals. Sometimes these viruses can make the jump from animals to humans. This is called a _____.
If you heard it, you know that it can get _____ in your head just like that. But at a Washington Nationals game it's not just _____ in your head.
In Mongolia demonstrators protested the arrival of China's top diplomat on Tuesday. Critics accuse China of _____ing native language and culture in ethnic Mongolian areas within its borders.
National Guard soldiers and airmen gather in Washington D.C. to increase security before the _____ ceremony of President-elect Joe Biden on Wednesday.
synchronous rotation ▷▷▷
Because the moon's period of rotation is equal to its period of revolution, that is to say, because the moon takes the same amount of time to spin as it does to orbit the earth, we from the earth only ever see one face of the moon.