Saying that his state must take steps to plan for prolonged water shortages, Gov. Jerry Brown declared a state of emergency over an extended drought Friday. California faces "water shortfalls in the driest year in recorded state history," according to the governor's office.
The nation's capital is a pretty old city by American standards. It dates back to the late 18th century. Despite frequent face-lifts, parts of it are wearing out — for example, its underground gas pipelines. New research shows that Washington, D.C., suffers from thousands of leaks of natural gas.
"We drove 1,500 road miles in Washington, D.C., and found about 6,000 leaks," says Robert Jackson, an ecologist and environmental scientist at Duke University. "That's roughly four leaks every mile."
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.
In desperation to save the rare northern spotted owl, biologists are doing something that goes against their core — shooting another owl that's rapidly taking over spotted owl territory across the northwest.
"If we don't do it, what we're essentially doing, in my view, is dooming the spotted owl to extinction," says Lowell Diller, senior biologist for Green Diamond, a timber company.
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.
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.