Science is first of all about discovery (the first word on
everything). But the more science knows, the more it realizes what it doesn't know (the last word on nothing). Curiosity and humility: the human condition.

It's an illustration from a display at the Field Museum in Chicago. It shows the different types of symmetry of life forms on Earth.

Now that humanity has spread right to the Earth's poles and adopted a 24-hour business day, our internal clocks struggle against our urban schedules. And the cost of ignoring these circadian clocks is high. The Exxon Valdez oil spill, Three Mile Island, the Bhopal chemical plant explosion, and the Chernobyl disasters were all attributed to human error and all happened on the night shift.

Jessa Gamble travels the planet to answer an essential question: Do we want to construct our own artificial timetables or find a new connection with the body's internal one?

Science: clear, crafty, and delivered to your door

Mon 2/20 Michelle

Tue 2/21 Ann

Wed 2/22 Cassandra

Thu 2/23 Thomas

Fri 2/24 Virginia