One popular theory has been that longer necks make male giraffes more sexually attractive to females, causing necks to grow through evolution as males with genes for longer necks are more likely to have babys.A different way sexual selection can work to make a male animal a more successful mate is by helping it to compete for females instead of just getting one eazly.
Tennis players on the ball with maths!!!
Tennis players unwittingly use maths to estimate the speed and accuracy of their opponent's return.Top tennis players, like those in the Australian Open that started today, know intuitively how hard and fast a ball is likely to approach and where it is likely to go.Like all sportspeople, tennis players use knowledge gained from watching their opponents as well as what they learn from playing against them.
Research shows good survival for births up to eight weeks premature !!!
New research shows babies born up to eight weeks premature have virtually the same survival rates as full-term infants.The study by paediatricians at the Royal Women's Hospital in Melbourne looked at almost 2,500 pre-term births from 1994 to 1996.The mortality rate was 65 % for babies born at 23 weeks gestation, falling to 4 % at 28 weeks.For infants born at 32 to 36 weeks there was a 99.77 % survival rate, virtually the same as full-term births.
One popular theory has been that longer necks make male giraffes more sexually attractive to females, causing necks to grow through evolution as males with genes for longer necks are more likely to have babys.A different way sexual selection can work to make a male animal a more successful mate is by helping it to compete for females instead of just getting one eazly.
Tennis players on the ball with maths!!!
Tennis players unwittingly use maths to estimate the speed and accuracy of their opponent's return.Top tennis players, like those in the Australian Open that started today, know intuitively how hard and fast a ball is likely to approach and where it is likely to go.Like all sportspeople, tennis players use knowledge gained from watching their opponents as well as what they learn from playing against them.
Research shows good survival for births up to eight weeks premature !!!
New research shows babies born up to eight weeks premature have virtually the same survival rates as full-term infants.The study by paediatricians at the Royal Women's Hospital in Melbourne looked at almost 2,500 pre-term births from 1994 to 1996.The mortality rate was 65 % for babies born at 23 weeks gestation, falling to 4 % at 28 weeks.For infants born at 32 to 36 weeks there was a 99.77 % survival rate, virtually the same as full-term births.