Two-billion-year-old evaporites capture Earth’s great oxidation
نویسندگان
چکیده
منابع مشابه
3.7 billion year old biogenic remains
3.7 Billion year old inclusions inside garnet crystals contain 13C depleted carbonaceous material consistent with biogenic origin. Additional evidence in the form of the other elements of life mainly O, N and P were found to be structural bound to this material by using a new technique, AFM-IR. Here we show additional evidence that support our claim. By overlaying maps generated by the AFM-IR w...
متن کاملCircadian Biology: A 2.5 Billion Year Old Clock
A recent study suggests that circadian clocks may have evolved at the time of the Great Oxidation Event 2.5 billion years ago in order to drive detoxification of reactive oxygen species.
متن کاملTwo year-old boy with ischemic stroke
Arterial ischemic stroke (AIS) in adults is considered a serious health threat and requires urgent medical treatment. Prompt diagnosis allows the therapeutic option of thrombolysis within the time window of 3 to 6 hours after first symptoms. Alternatively, early anti-platelet therapy is effective in improving the outcome after stroke. The incidence of pediatric AIS range from 2 to 5 per 100 000...
متن کاملA two-billion-year history for the lunar dynamo
Magnetic studies of lunar rocks indicate that the Moon generated a core dynamo with surface field intensities of ~20 to 110 μT between at least 4.25 and 3.56 billion years ago (Ga). The field subsequently declined to <~4 μT by 3.19 Ga, but it has been unclear whether the dynamo had terminated by this time or just greatly weakened in intensity. We present analyses that demonstrate that the melt ...
متن کاملEarly Puberty in a Two-year-old Boy
Precocious Puberty in a 2-year-old boy A 2-year-old boy with precocious isosexual matura- (3) Lion is reported. The pubertal values of serum LH, FSH and Testoste- (4) on and lack of any other pathologic finding were in favour of diagnosis of idiopathic sexual precocity. The L.R.F. response test was of the adult pattern. The serum LH, FSH and Testosterone decreased following (5) treatment ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science
سال: 2018
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aar2687