humans Archives - Pinfaves

Brain and tooth size didn’t co-evolve in humans

January 4, 2017 Srijitaand, Brain, co-evolve, didn't, humans, In, Size, tooth

Brain and tooth size didn’t co-evolve in humans Contradicting a prevalent perception, a new study says that our brain enlargement and dental reduction did not happen in lockstep. The findings suggest that evolution of brain and tooth size in humans were likely influenced by different ecological and behavioural factors. “Once something becomes conventional wisdom, in no time at all it becomes dogma,” said study co-author Bernard Wood, Professor at George Washington University, US. “The co-evolution of brains and teeth was on a fast-track to dogma status, but we caught it…

Altering ‘Flavour’ of Humans Can Tackle Malaria

October 13, 2016 SrijitaAltering, Can, Flavour, humans, malaria, of, Tackle

A specialised area of the mosquito brain mixes tastes with smells to create unique flavours, scientists have revealed, suggesting the development of a powerful odourant that can make “human flavour” repulsive to malaria-bearing species. Instead of feasting on us, the mosquitoes can then keep the disease to themselves, potentially saving an estimated 450,000 lives a year worldwide, said the team from Johns Hopkins University. “All mosquitoes, including the one that transmits malaria, use their sense of smell to find a host for a blood meal. Our goal is to let…

Capacity of humans to reproduce beyond 30 is reducing

August 12, 2016 Srijita30, beyond, Capacity, humans, Is, of, reducing, reproduce, to

Capacity of humans to reproduce beyond 30 is reducing (Getty Images) The capacity to reproduce both in males and females beyond the age of 30 has witnessed a steep decline due to lifestyle and environmental changes, fertility experts said. According to the experts, until two decades ago females could become pregnant even in their late 30s, but now the only option left for even younger women to conceive is through IVF. Women are born with with 1-2 million eggs, which is reduced to 100-200 thousand in the early 20s. As…