/r/askscience

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How are fireworks made to explode in complicated shapes?

1711 upvotes • RationalAsh

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If two power plants feed AC voltage/current into the same electricity grid, how do we make sure they are in the same phase to not cancel out each other?

1711 upvotes • Boshy911

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AskScience AMA Series: We recently launched the new Land Cover tool in the NASA GLOBE Observer app. Ask us anything!

1711 upvotes • AskScienceModerator

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Why is the hazard/mortality ratio for HbA1c higher for the lowest levels? Is it explained primarily by a significant fraction of the ill population having high RBC turnover?

1711 upvotes • inquilinekea

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How and why is it that being physically fit can make you more resistant to colds or flus? Or is that idea a myth?

1710 upvotes • stubbledchin

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AskScience AMA Series: I am the co-founder of iNaturalist, an online social network for sharing biodiversity information. Ask Me Anything!

1710 upvotes • AskScienceModerator

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Do astronauts loose hair cause problems on the ISS?

1710 upvotes • Ph4ntomiD

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What is the apex predator of a typical backyard?

1709 upvotes • pattysmife

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If life started 3.6 billion years ago and photosynthesis developed 3.4 billion years ago, where did the energy for life come from for the intervening 200 million years?

1707 upvotes • Sam-I-Am-Not

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When I get hungry, is my body saying that it needs food, or that it's expecting food? NSFW

1706 upvotes • [deleted]

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How are fireworks made to explode in complicated shapes?	1711	RationalAsh
If two power plants feed AC voltage/current into the same electricity grid, how do we make sure they are in the same phase to not cancel out each other?	1711	Boshy911
AskScience AMA Series: We recently launched the new Land Cover tool in the NASA GLOBE Observer app. Ask us anything!	1711	AskScienceModerator
Why is the hazard/mortality ratio for HbA1c higher for the lowest levels? Is it explained primarily by a significant fraction of the ill population having high RBC turnover?	1711	inquilinekea
How and why is it that being physically fit can make you more resistant to colds or flus? Or is that idea a myth?	1710	stubbledchin
AskScience AMA Series: I am the co-founder of iNaturalist, an online social network for sharing biodiversity information. Ask Me Anything!	1710	AskScienceModerator
Do astronauts loose hair cause problems on the ISS?	1710	Ph4ntomiD
What is the apex predator of a typical backyard?	1709	pattysmife
If life started 3.6 billion years ago and photosynthesis developed 3.4 billion years ago, where did the energy for life come from for the intervening 200 million years?	1707	Sam-I-Am-Not
When I get hungry, is my body saying that it needs food, or that it's expecting food? NSFW	1706	[deleted]