The climate is warming, and much of the increase is due to greenhouse gases, the most prevalent gas being carbon dioxide. Methods for removing existing carbon from the atmosphere are in the works, and ...

A court decision in a wrongful-death case in Alabama last month drew a spotlight to in vitro fertilization, an increasingly popular method of conceiving babies for the infertile. In vitro — Latin for ...

Removal of excess carbon dioxide in the atmosphere, in addition to major reductions in ongoing emissions, is required to stave off the most severe consequences of climate change. Large-scale ocean ...

Researchers from Princeton University and the Swiss Federal Institute of Techonology in Zurich have confirmed that during the last ice age iron fertilization caused plankton to thrive in a region of ...

When you’re having trouble getting pregnant, going to a fertility clinic can be an overwhelming experience. Besides being stressful in its own right, fertility treatment comes with a whole vocabulary ...

(a) A pollen grain containing the two sperm cells. It produces a pollen tube, which arrives at the ovule. After the arrival, one of the synergid cells degenerates and the pollen tube bursts to ...