Water bears, also known as tardigrades, can survive boiling, freezing, the vacuum of space and years of dessication. Biologist Bob Goldstein, of the University of North Carolina Chapel Hill, describes water bears and explains why he studies them.

Mr. Wallace told the students “No guesses were correct, but one guess was off by 4 jellybeans, one was off by 13 jellybeans, one was off by 11 jellybeans, and one was off by 2 jellybeans. I will give you extra credit if you can figure out the number of jellybeans now.”

Randomly place between 8 and 16 dots on a piece of paper. These will be your “fence posts.”

Next, draw “fences” between your fence posts to make several “pastures.” Make sure you use every fence post and that have lots of open space for your livestock. Also, make sure your fences don’t cross.

Count the number of fences and pastures.

Add the number of fence posts to the number of pastures and subtract the number of fences. Your answer should be the same as your classmates, even if they used a different number of fenceposts, drew a different number of fences and had a different number of pastures.

Most of us know that a second is a unit of time. There are sixty seconds in a minute and sixty minutes in a hour.

However, the term second is also a term used in measuring angles. Angles are usually measured in degrees. However, like most measurements, we can get very precise. Degrees are divided into 60 minutes (1 degree = 60 minutes) and minutes are further divided into seconds (1 minute = 60 seconds).

In mapping on a global scale, precise measurement is key. A difference of 1 second of longitude or latitude is over 100 feet (depending on terrain).