Kepler-22b, seen in this artist's rendering, is a planet a bit larger than Earth that orbits in the habitable zone of its star. Some researchers think there might be "superhabitable" worlds that may not resemble Earth.
In their hunt for potentially habitable planets around distant stars, scientists have been so focused on finding Earth-like planets that they're ignoring the possibility that other kinds of planets might be even friendlier to life, a new report says.
So-called superhabitable worlds wouldn't necessarily look like Earth but would nonetheless have conditions that are more suitable for life to emerge and evolve, according to the study published this month in the journal Astrobiology.
Originally published on Thu January 16, 2014 7:51 pm
They were so young, the folks who invented America. James Madison, on July 4, 1776, was 25. James Monroe was 18, Alexander Hamilton, 21, Marquis de Lafayette, 18, Aaron Burr, 20, Betsy Ross, 24, Gilbert Stuart, 20. Ben Franklin, of course, was much older, grander and world famous. But he was the only one.
The world's biggest trees, such as this large Scots pine in Spain's Sierra de Baza range, are also the world's fastest-growing trees, according to an analysis of 403 tree species spanning six continents.
Credit Asier Herrero / Nature
The General Sherman, a giant sequoia in California's Sequoia National Park, is more than 2,000 years old, and is thought to be the largest tree (by volume) in the world.
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.