Allison Gasparini

All Stories by Allison Gasparini
- Humans
Eight billion people now live on Earth — a new record
The global population hit this milestone on November 15, according to an estimate from the United Nations.
- Physics
Explainer: What are the different states of matter?
Most people know solids, liquids and gases — but what about the four other states of matter?
- Space
Some of the sun’s iconic coronal loops may be ghostly illusions
Wrinkles in the sun’s outer atmosphere might trick the eye into seeing glowing arches, scientists now report.