Discover September 2015

Underground Transit Projects Reveal Secrets Buried Beneath Cities
by Jennifer Hattam
Subway construction offers archaeologists rare opportunities to dig into historic urban centers — but with the clock ticking.

Super-Earths Might Be Our Best Bet For Finding Alien Life
by Adam Hadhazy
Worlds a few times larger than ours litter our universe, and they have good prospects for habitability.

Air Pollution Causes Epigenetic Changes That May Trigger Asthma
by Melissa Pandika
Heavy pollution leaves behind molecular scars that may be passed on to children and grandchildren.

Seeing the Brain's Broken Cables
by Bijal P. Trivedi
A new imaging technique helps researchers map the damage from traumatic brain injury with unprecedented accuracy.

Genes Before DNA
by Matthew Cobb
How geneticists around the world struggled to bring the foundation of life's building blocks to light.