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AnthropologyEarliest Ancestor Emerges in Africa
Scientists have found 5.2- to 5.8-million-year-old fossils in Ethiopia that represent the earliest known members of the human evolutionary family.
By Bruce Bower -
18958
The study in “Marijuana may boost heart attack risk” appears to be more about the effects of smoking and deep inhalation than a useful examination of the effects of tetrahydrocannabinol, which is what marijuana smokers seek. The report makes it sound as though this active ingredient is the cause of the marginal increase in heart […]
By Science News -
Health & MedicineMarijuana may boost heart attack risk
Marijuana seems to heighten the risk of heart attack in some people during the hour after which it is smoked.