40 percent

Isolated for six months, scientists in Antarctica began to develop their own accent

botanical gardens can lower the temperature of inner city air by as much as 5 °C. Wetlands and rain gardens are not far behind in the cooling stakes, at 4.7 and 4.5 °C respectively, trees planted along streets also lowered air temps by 3.8 °C while city parks managed 3.2 °C.

Maker uses Raspberry Pi and AI to block noisy neighbor’s music byhacking nearby Bluetooth speakers

A New York City medical school will offer students free tuition following a $1bn donation from the 93-year-old widow of a major Wall Street investor.

the number of active serial killers dwindled from 198 in 1987, the largest number on record, to 12 in 2018. Why the decline? Simply put, it’s harder than ever to get away with serial murder.

Why are there fewer serial killers now than there used to be?

Police only make an arrest — or “clear” a case, in justice jargon — in about 60 percent of all homicides. The other 5,000 end without closure. In other words, murderers have a 40 percent chance of getting away with murder. The question is, how many of those unsolved cases are the work of a serial killer?