LifeLooks like we've got allergies all wrong From pollen to peanuts, we humans are an allergic lot. So could it be that allergies serve an evolutionary purpose, ask Noah Palm and Ruslan MedzhitovOpinion
EarthLeech cocoon preserves 200-million-year-old fossil Move over amber. When it comes to preserving soft-bodied animals through the ages, there's a newcomer in town: fossilised leech "cocoons" ¿ìè¶ÌÊÓÆµ