Genomatix Software GmbH, a pioneer and leader in the analysis of eukaryotic transcriptional regulation, releases MatBase, a knowledge base of transcription factors (TF).

In the long, dark days of winter, gardeners are known to count the days until spring. Now, scientists have learned, some plants do exactly the same thing.

As primates evolved 7 million years ago, the more advanced species stopped making a protein that University of Central Florida researchers believe can effectively block the HIV-1 virus from entering and infecting blood cells.

For the second time in as many months, the IODP Arctic Coring Expedition (ACEX) is making news with new analysis of ocean-floor sediments. In the Aug. 10 issue of Nature, an article by several of the expedition scientists summarizes their findings: more evidence that the Arctic was extremely warm, unusually wet, and ice-free up to the time the last massive amounts of greenhouse gases were released into the Earth's atmosphere – a period calculated to have occurred 55 million years ago, and known as the Paleocene/Eocene thermal maximum, or PETM.

When scientists study habitats that alien species have invaded, they usually find predictable patterns. The diversity of native species declines, and changes occur in natural processes such as nutrient cycling, wildfire frequency and the movement of water through the system.

A gene that enables rice to survive complete submergence has beenidentified by a team of researchers at the International RiceResearch Institute in the Philippines and at the University ofCalifornia's Davis and Riverside campuses. The discovery allows fordevelopment of new rice varieties that can withstand flooding, thusovercoming one of agriculture's oldest challenges and offering reliefto millions of poor rice farmers around the world.

In 2003, the highly contagious and often-deadly mystery disease now called SARS emerged explosively out of Southern China. It eventually killed an estimated 916 people in Asia, Europe, and North and South America--nearly one in ten of those it infected.

Scientific travelers of the 18th and 19th centuries led waves of daring expeditions into Polynesia, netting oceans of discoveries about its geography, flora and fauna and people.

Most of us are familiar with the winding staircase image of DNA, the repository of a biological cell's genetic information. But few of us realize just how tightly that famous double helix is wound. Stretched to its full length, a single molecule of human DNA extends more than three feet, but, when wound up inside the nucleus of a cell, that same molecule measures about one millionth of an inch across. Biologists have long believed that as a molecule of DNA is stretched, its double helix starts to unwind. As much sense as this makes from an intuitive standpoint, a recent experiment proved it not to be the case.