An ancient genetic mechanism needed for plant fertility is helping to solve a science mystery 700 million years in the making.
The researchers discovered how a gene called DUO1 known to control sperm production inside pollen grains of flowering plants, is also used by primitive land plants to produce free-swimming sperm. They found that the gene originated in the stoneworts, an ancient group of aquatic algae that diverged from land plants over 700 million years ago.The paper
suggests that it was a simple change in the DUO1 gene sequence that allowed the algal ancestors of land plants to produce small swimming sperm to increase the chances of fertilization in an aquatic environment.
When I first began writing about the anti-vaccine issue, California was the home of the movement (1). The state had more philosophical exemptions than the rest of the country combined, and they were primarily wealthy white elites living on the coast.
You know, like Hollywood.
Medicine is not going to be enough. That was the first lesson that the world learned when Acquired Immune Deficiency Syndrome (AIDS) raged across cultures in the 1980s. Though its cause was learned to be Human Immunodeficiency Virus (HIV) its transmission was social. In some undeveloped countries, unprotected sex, infidelity, and sometimes even rape were points of pride. In wealthier nations, risky behavior in sub-cultures was touted as freedom.
Which corporation lets executives commute to work on emissions-belching airplanes
, damages native landmarks while putting up advertising
, speculates on international bank trade while saddling consumers with their losses
, and writes policies for its customers that it then defies in its own practices?
The United States, and other countries with modern science and technology regulations, have enjoyed terrific boosts in yields, so great that food has become a cheap commodity, which has allowed for alternative processes (organic, shade tree, natural, etc.) to flourish by charging a premium.
For any of you who haven't seen it, here is a stereo image of Ultima Thule, alternating between two images which help if you don’t have 3D Anaglyph glasses. The interesting thing about it is that there is no sign that the two lobes are more than slightly squashed by touching each other. They seem to have formed like this, in a gentle process, as separate objects that gradually grew by gravitational attraction of smaller pieces. Then eventually, the system lost energy probably due to influence of some third moon, and as they came together gently touched each other.
Lacking clairvoyant technology as in "The Minority Report", predicting teen rape is impossible, but there are risk factors that can be warning signs.
A group of sociologists conducted interviews with victims from their university, a two-year college and community sites serving low-income young women, including a county health clinic and a transitional living program, totaling 148 college-aged women between the ages of 18 and 24 who experienced partner violence in at least one prior relationship.
Cells along the brain's cavities are equipped with tiny hair-like protrusions called cilia but relative to their importance, we know little about them. Unless they are not doing their job. People with ciliary defects can develop neurological conditions like hydrocephalus and scoliosis.
New research in Current Biology shows that cilia are essential for the brain to develop normally and gives us more insight into how cilia work and why they are so important to our brains.
The Environmental Protection Agency has requested comments on proposed ad hoc participants on the Science Advisory Committee on Chemicals, which inside EPA will analyze compounds as needed by the Toxic Substances Control Act. At the bottom is my official statement
Though mitochondria, the energy factories of our cells, are the root of numerous diseases, including thousands in children each year, funding for such diseases is scant compared to heart or breast cancers or other medical issues.
That may be because it is hard to understand. But progress is being made. A group of researchers from the Andalusian Centre for Molecular Biology and Regenerative Medicine (CABIMER) has revealed new ways to understand the molecular basis of some human diseases that are stem from poor functioning of the mitochondria
and, in this way, allow for the development of therapies against these diseases.