Earth
- Life
Life on Earth took a licking, kept on ticking
Earth's early organisms may not have had to restart after a long spell of asteroid impacts.
- Chemistry
BPA: On the way out? Sort of
Half-hearted bans won't really protect babies, much less the rest of us.
- Psychology
School-age lead exposures most harmful to IQ
New studies find lead exposure has greater potency in school-age children than in infants and toddlers, including effects on brain volume.
- Chemistry
Nonstick chemical pollutes water at notable levels
Residues of nonstick chemicals — from unknown sources — appear to be approaching concentrations associated with adverse effects in laboratory animals.
- Animals
Controversial polar bear rule stands
Creature’s plight remains separate from decisions on greenhouse gas emissions.
- Earth
Federal budget’s new ‘black book’
The administration details a proposed $17 billion in budget savings in a new book.
- Earth
U.S. radiation dose has doubled
New analysis finds radiation-based medical procedures have skyrocketed.
- Earth
Report of earlier, longer puberty in girls
A Danish study finds young girls are entering puberty notably earlier than 15 years ago — for reasons that remain unknown.
- Health & Medicine
Science budgets look rosy, AAAS finds
The president and Congress have collaborated in targeting substantial increases for federal investments in R&D this year.
- Climate
On federal science — and science spending
Things you might have gleaned at the AAAS Forum on Science and Technology Policy.
- Earth
A limit for carbon emissions: 1 trillion metric tons
To reduce risks of severe damage from climate change, humans should burn no more than 1 trillion tons of carbon in total, researchers suggest.
- Plants
Climatic effects of tree-killing hurricanes
A new analysis suggests storm damage returns millions of metric tons of carbon dioxide to the atmosphere each year.
