Researchers wanted to know if removing the fee for giving birth at public health facilities has a positive effect in developing countries.
Scientists wanted to study the impact of less effective vaccines in preventing flu-related infections, hospitalizations and deaths.
Scientists investigated the productivity and metabolism of microorganisms living below the sea floor at deep-sea hot springs.
Scientists wanted to know if bullfrogs play a role in the spread of Batrachochytrium dendrobatidis, a deadly fungus that attacks amphibian skin.
Researchers wanted to know how many current or future power plants people could run while complying with the Paris climate agreement, which set a worldwide goal for limiting greenhouse gases.
Researchers recorded and studied the way fathers spoke to and played with their children to understand whether fathers interact differently with their sons than with their daughters.