Water may be more widespread and recent on Mars than previously thought, based on observations of Martian sand dunes by China's rover. The finding highlights new, potentially fertile areas in the warmer regions of Mars where conditions might be suitable for life to exist, though more study is needed.
The two times the water stopped flowing over Niagara Falls
The majesty that is Niagara Falls has had its, well, less majestic moments over the past two centuries. In fact, twice the falls have dried up completely – once stopped by nature and the second time 120 years later, it was stopped by man. Way back on March 30, 1848, the falls went down to a trickle, leaving local American and Canadians citizens on both sides puzzled. Given the limited technology and means of communication at the time – Alexander Graham Bell didn’t invent the telephone until 1876 – no one knew why it simply stopped.