Feel the Beat

Human hearts beat about 70 times per minute. That's about 100,800 time per day.

Super-butterfly

The Monarch butterfly is truly amazing in many ways. The coolest (in my opinion) is when they are migrating south, a super generation is born to make the trip: they live longer (about 10x as long) and have higher stamina. This super generation is created every four generations.

Gravity affects light

Gravity has just as much of an effect on light as any other object. But why can't we see light fall to the ground? Light is traveling so fast that gravity barely affects light in the amount of time before the particles of light hit something.

About the number 253

Aside from the sum of 2, 5 and 3 equaling 10 (a very round number), 253 has some more cool features:
    ⇒253 converted to binary is 11,111,101. In decimal, 11,111,101 is a prime number.
    ⇒2 - 5 + 3 = 0
    ⇒2, 5 and 3 are the first 3 prime numbers

Morse code: made for speed

It may look like the letters in the morse code alphabet were randomly assigned dots and dashes. This is not the case. The letters were assigned codes based on frequency of the letter. For example, "e" is the most common letter. The code for "e" is a simple dot. "t" is the next most common letter, represented by a dash.

We are going astronomically blind

Space is expanding. As space expands, stars and galaxies get farther away. The space between our solar system and those stars is increasing exponentially. As they get further away, the gap between us grows bigger faster. For more and more stars, the space is growing faster than the speed of light. Once this happens, we have no way to see them. 

The First Marathon

When the Persians were defeated in the Battle of Marathon, a Greek messenger (who had fought in the battle) was sent from Marathon (the location of the battle) to Athens, Greece. He ran the whole distance, announced to the assembly "we have won"*, and fell down dead. This is where a Marathon (a 42.195 kilometer run) comes from.