Washington, Sept 26 : Modern humans still retain caveman’s survival instincts at spotting predators and prey, despite living in the comforts of modern homes in urban localities, according to a new study published online in this week’s issue of the Proceedings of the National Academy of Sciences (PNAS).

The study reveals that humans today are hard-wired to pay attention to other people and animals much more than non-living things, even if inanimate objects are the primary hazards for modern, urbanized folks.

Washington, Sept 25: Researchers at the University of Munich in Germany have found that circulating tumour cells (CTC), cancer cells circulating in the blood, can be detected before and after chemotherapy treatment, and so can be helpful in identifying patients who are likely to have a recurrence of cancer after the procedure.

Addressing a press conference at the European Cancer Conference (ECCO 14) on Monday, Dr. Julia Juckstock said that the results could help improve the design of trials of chemotherapy in breast cancer, and reduce costs to health services.

Washington, Sept 25: Hormone therapy in early post-menopause increases sexual interest, but has no effect on memory, a new study has revealed.

The study was led by Pauline Maki, associate professor of psychiatry and psychology at the University of Illinois at Chicago.

"Contrary to what we predicted, hormone therapy did not have a positive affect on memory performance in younger mid-life women," Maki said.

Washington, Sept 23 : Climate change is accelerating the spread of dengue fever throughout the Americas and in tropical regions worldwide, a new study by a Harvard Medical School researcher has revealed.

The study said more rainfall in certain areas and warmer overall temperatures was providing optimal conditions for mosquitoes –which spread the virus that causes dengue – to breed and expand into new territories.

Washington, September 23: As against the findings of all previous studies on vitamin E, a new research has now suggested that the levels of the micronutrient that have been commonly used in clinical trials to reduce oxidative stress so far have been far lower than what they actually should be.