New Chemicals

In 1965, the CAS Chemical Registry System listed 211,934 synthetic chemicals. In 2006, that number rose to 88,758,285 and it’s still growing. Many of the chemicals are in products you use everyday from cosmetics to plastic toys.

Many soak through our skin or are breathed in and can be detected inside our bodies. For instance, researchers sprayed the common household oil, WD-40, on volunteers’ fingertips, and detected it in their blood five minutes later.

The average American male has a sperm count 75% lower than 40 years ago. Could this be partially due to these chemicals?

Seeing Back Billions of Years

Scientists estimate that the universe is 15 billion years old. By looking far out into space, they can see the past in other places, because light takes time to reach us. An event that happened on the sun nine minutes ago will just be now visible to us. Astronomers have recently discovered a place so far away that it dates back to almost the beginning of the universe. What we see today happened 14 billion years ago.

Radio Waves and Snowflakes

In a 1980 television show, popular astronomer Carl Sagan said, “All of the radio waves from space ever studied equal less than the power of a single snowflake hitting the ground.”

That wasn’t quite true then, but it was close. Today, with many more radio telescopes and many more years of collecting astronomical radio waves, the total power of all the waves studied from space is still much less than the energy your body used while you read this post.

Astronomer Carl Sagan, public domain via Wikimedia Commons