The basic technology that produces X-rays has remained essentially the same for a century, but now scientists and physicians at the University of North Carolina at Chapel Hill and Applied Nanotechnologies Inc. say they should be able to improve it significantly.

Experiments the team conducted have shown they can cause carbon nanotubes, a new form of carbon discovered about a decade ago, to generate intense electron beams that bombard a metal “target” to produce X-rays. Researchers say they

Women having their babies by caesarean section could find it harder to become pregnant later, a study has found. Researchers in Bristol have discovered that once women have had a caesarean and then try to get pregnant again, the risk of it taking more than a year to conceive another baby increases.

The seven thousand women were all part of the Avon Longitudinal Study of Parents and Children (ALSPAC), popularly known as Children of the 90s, which has monitored the health and development of ov

The scientific community concurs that the occurrence of harmful algal blooms (HABs) is increasing worldwide. The annual loss from HABs worldwide is probably more than $1 billion, including both mortality and unmarketable products. The annual human cost has been estimated at 2,000 cases of poisoning with 15% mortality. Because there is no international record of economic loss and human intoxication incidents by HABs, these numbers are almost certainly underestimates.

In a recent issue of Nort

Bacteria that reproduce inside aphids have not changed their genetic make-up for the last 50-70 million years. This makes the genomes of these bacteria the most stable of all organisms yet studied. This finding is presented by a team of scientists at Uppsala University, Sweden, in the latest issue of the scientific journal Science.

Under the leadership of Professor Siv Andersson, researchers Ivica Tama, Lisa Klasson, Björn Canbäck, Kristina Näslund, Ann-Sofie Eriksson, and Johan Sandström at

There is high temperature inside our planet and the reason is not known yet. A common belief that the Earth`s interior is heated by radioactive elements is now doubted of. Professor Felix Letnikov from Irkutsk Institute of the Earth`s Crust have proposed an idea that the heat is formed in the outer core because of friction between its layers.

Different geophysical data confirm that there is a heat source inside the Earth. In the mantle there are zones with low viscosity, which corre

Fears about the impact of surrogacy on the well-being of children and families appear to be unfounded, according to findings from the world’s first controlled, systematic investigation of surrogate families, the annual conference of the European Society of Human Reproduction and Embryology heard on Monday 1 July.

In fact, the mothers of children born via a surrogacy arrangement show more warmth towards their babies and are more emotionally involved than is the case in families where the chil