News
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Health & MedicineNew rules for cellular entry may aid antibiotic development
A new study lays out several rules to successfully enter gram-negative bacteria, which could lead to the development of sorely needed antibiotics.
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AnimalsSeabirds use preening to decide how to divvy up parenting duties
Seabirds in poor condition may communicate this information to their partner by delaying or withholding preening.
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AnthropologyHomo naledi may have lived at around same time as early humans
South African species Homo naledi is much younger than previously thought.
By Bruce Bower -
Planetary ScienceOxygen on comet 67P might not be ancient after all
Molecular oxygen detected around comet 67P may not be a relic of the solar system’s birth.