Andrew Holter

Amid Rollbacks on Environmental Protections, the EPA Goes the Other Way on Delaware River Water Quality

On: October 6, 2025

Environmental activists praise the new rule, which will improve the health of the river for fish. But wastewater-treatment utilities face millions in new costs to make it happen. By Jon Hurdle The federal government is raising the required oxygen level in an urban stretch of the Delaware River near PhiladelphiaContinue Reading

Atlas Blue Butterfly Has 229 Pairs of Chromosomes, Scientists Find

On: September 15, 2025

In: Technology

Scientists at the Wellcome Sanger Institute and the Institut de Biologia Evolutiva in Spain have sequenced the genome of a female Atlas blue butterfly (Polyommatus atlantica) and found that it has 227 pairs of autosomes and four sex chromosomes, the highest number of chromosomes out of all multicellular animals inContinue Reading