Like other animals and many living things, we humans grow when we're young and then stop growing once we mature. But trees, it turns out, are an exception to this general rule. In fact, scientists have discovered that trees grow faster the older they get.
Once trees reach a certain height, they do stop getting taller. So many foresters figured that tree growth — and girth — also slowed with age.
Florida may soon become the latest state to allow doctors to prescribe marijuana. Advocates there are gathering signatures to put a medical marijuana referendum on the fall ballot.
But Florida's Legislature may act sooner to allow residents access to a particular type of marijuana. Advocates say the strain called Charlotte's Web offers hope to children with severe seizure disorders.
The Centers for Disease Control and Prevention is urging pregnant women who live in the areas of West Virginia where a toxic chemical leaked into the water supply last week to drink bottled water, even in places where the no-use ban has been lifted. The move comes "out of an abundance of caution," the CDC and the state's Bureau of Public Health say.
Everyone wants to be free; or at least have some choice in life. We all have our professional, family and social commitments. On the other hand, most people believe that they are free to choose what to do, from the simplest to the more complex: should I drink coffee with sugar or sweetener? Do I put some money in the savings or do I spend it all? Who should I vote for in the next elections? Should I marry Carmen or not?
The question of free will is essentially a question of agency, of who is in charge as we go through our lives making all sorts of choices.
A creature that lived 375 million years ago and is thought to have been the first fish to have made the transition to land sported large pelvic bones in addition to its leg-like front fins, new research shows, suggesting that it was a more efficient walker than previously thought.
Tiktaalik roseae, discovered in 2004 on Ellesmere Island in Nunavit, Canada, is a key transitional fossil that links lobe-finned fishes and tetrapods, the first four-limbed vertebrates at the end of the Devonian period.
Originally published on Tue January 14, 2014 1:36 pm
By Adam Frank
Right now, as you are reading these very words, trillions of particles called neutrinos are streaming through your body. Hardly a single atom in your body feels their passage. Hardly one of the trillion neutrinos feels your presence. They are ghosts to you as you are to them. But that doesn't mean these tiny flecks of matter don't matter.
Neutrinos, it turns out, have shaped the universe and their remarkable story has now been expertly told in a new book by astrophysicist Ray Jayawardhana. It's called Neutrino Hunters.