What is the controversy that surrounds the use of embryonic stem cells and how has this affected the science of biotechnology?

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

What are some possible short and long term medical concerns for crew members on longer space exploration trips