Objective To evaluate systematic reviews of randomised controlled trials (RCTs) on the effects of exercise on general cognition, memory and executive function across all populations and ages. Methods ...

Space debris—the thousands of pieces of human-made objects abandoned in Earth's orbit—poses a risk to humans when it falls to the ground. To locate possible crash sites, a Johns Hopkins University ...

Sleep and hormones affect each other through your circadian rhythm, also called the sleep-wake cycle. A lack of sleep can affect several hormones at once. Getting 7 to 9 hours of sleep helps regulate ...

Plus is worth it if you often hit Free limits and want priority. Pro is for heavy users who need GPT-5.2 Pro and max quotas. Free is powerful, but all tools come with tighter caps. OpenAI introduced ...