上诉 This week on Ask a Teacher, we answer the following question from a listener.

詹姆斯·麦迪逊，美国宪法之父 Madison was elected president of the United States in 1808.

日本丰田建造了一座类似城市的中心来测试机器人和人工智能 Japanese automaker Toyota says it is building a research center in a city-like setting to test robotics, artificial intelligence (AI) and autonomous vehicle technologies.

美国间谍：弗吉尼亚·霍尔 Thousands of women have served as intelligence agents for the United States and its allies since the nation began.

美国制造的摩天大楼 Skyscrapers were invented in the United States.

海滩，海岸，岸边 This week on Ask a Teacher, we answer a question from Doyeon in Korea about the usage of three similar words.

保护地球免受小行星撞击的方法 Astronomers following asteroid activity in space estimate there is a very small chance an object large enough to destroy a whole city could strike Earth in 2032.

行星们齐聚夜空，上演一场视觉盛宴 All seven major planets form a kind of parade in the sky at the end of February.

科学家在丹麦发现类似巨石阵的环形遗迹 Danish researchers have announced the discovery of a collection of wooden pieces placed in a circle that are believed to date back thousands of years ago.

新发现或可解释火星红色的成因 Scientists say they might have identified the mineral on Mars that is responsible for making the planet appear red.