Tropical riparian ecosystems—those found along rivers and wetlands—recovered much faster than expected following the ...

Fossil evidence from North China suggests that some ecosystems may have recovered within just two million years of the ...

Ocean acidification occurs when carbon dioxide is absorbed into the water, forming carbonic acid and increasing the acidity of the water. The most common way this process happens is when ...

Excess gas before your period is a common symptom of premenstrual syndrome (PMS). Fluctuating hormones leading up to your period may affect the activity in your colon, leading to gas and other ...

Late or missed menstrual period Late period: 5 or more days late compared to normal menstrual cycle Missed period: no menstrual flow for more than 6 weeks Teen not using any birth control that stops ...

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Estimated change in ocean heat content globally averaged over the full ocean depth, from 1960–2023. Shading indicates the confidence range of the estimates. The measurements contributing to the early ...

Widespread ocean pollution threatens the health of more than 3 billion people, international study led by Boston College researchers shows Ocean pollution is widespread and getting worse, and when ...

Female bears usually go into estrous, or heat, in May or June. Some will experience a second cycle in July or August. They reach maximum fertility during a 3 to 5-day period, though their cycle lasts ...