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What happens if a person take caffeine and nicotine together? Net vasoconstricter or Net vasodilator?

Submitted by EastEntertainment947 t3_zqkdjp on December 20, 2022 at 9:49 AM

22 comments

Eye questions: what is the smallest creature with an eye? What is the closest thing to an eye that a non-animal has?

Submitted by Clay_Pigeon t3_zi2bfa on December 10, 2022 at 8:16 PM

17 comments

If you wrapped a human in a theoretical blanket that was able to insulate 100% of heat produced by the person, would that person’s body temperature eventually reach equilibrium, or would their metabolism cause them to keep getting hotter and hotter until they perish?

Submitted by NonEuclideanGal t3_zeov3u on December 7, 2022 at 1:52 AM

20 comments

At altitude does thinner air have the same composition as sea level?

Submitted by oxo42 t3_zd3sq9 on December 5, 2022 at 10:58 AM

7 comments

Why doesn’t regular screening improve outcomes for pancreatic cancer patients?

Submitted by raeflows t3_z3nal3 on November 24, 2022 at 3:49 PM

18 comments

I was recently quite blown away on learning that alligators can regrow their tails. I looked up whether crocodiles can do it too and found that they can't. Any insight of why this is the case (i.e. why crocs can't do it)?

Submitted by [deleted] t3_yy12a8 on November 17, 2022 at 8:44 PM

16 comments

Dogs and humans have been evolving alongside each other for 15,000 years. What other examples of coevolution have species benefited from most?

Submitted by Evening-Pirate-5948 t3_z6bj32 on November 27, 2022 at 8:23 PM

27 comments

Could H. erectus or any other archaic humans talk? Since they lived alongside H. rudolfensis and others, is it possible that they had a general language that they used to communicate cross-species?

Submitted by [deleted] t3_ym4g3z on November 4, 2022 at 5:08 PM

8 comments

Why do people with cancer suffer from increased weight loss?

Submitted by StoppedListeningToMe t3_yjma0j on November 1, 2022 at 9:42 PM

31 comments

When a human dies (from natural causes), are there certain parts of the body that remain "alive" longer than the rest of the body? How long does it usually take for those parts to "die" and for the entire body to be considered fully dead?

Submitted by flash17k t3_xxdqsh on October 6, 2022 at 7:20 PM

10 comments

How do ants find their way back "home"?

Submitted by DanieleJava t3_xtkth9 on October 2, 2022 at 9:52 AM

30 comments

I remember hearing during the hype leading up to the JWST launch that it would take roughly six months to a year to complete the first pass of an updated CMB map. How are we doing on that?

Submitted by yofomojojo t3_125suka on March 29, 2023 at 4:20 PM

6 comments

How did humans 10000 Years ago care about their Teeth?

Submitted by Takaharu7 t3_121wuz2 on March 25, 2023 at 7:44 PM

45 comments

When a wave travels goes from a higher impedance medium to a lower impedance medium, why would that cause a reflected wave?

Submitted by agabwagawa t3_11o7yro on March 11, 2023 at 2:10 AM

13 comments

Are prions/prion diseases transmittable from an infected human mother to a fetus?

Submitted by Blakut t3_11mpj0v on March 9, 2023 at 11:11 AM

8 comments

Will a 400m long tube have breathable oxygen inside?

Submitted by SnekkyGlekky t3_11019kw on February 11, 2023 at 11:34 PM

35 comments

Is time divided up into discrete quanta? Is time "quantized"?

Submitted by NulloK t3_10c47tv on January 14, 2023 at 11:34 PM

26 comments

If someone is allergic to house cats, are they likely to be allergic to big cats (Pantherinae)?

Submitted by 01nana10 t3_zkqhza on December 13, 2022 at 8:16 AM

6 comments

Could astronauts in orbit for long periods be prophylactically treated with medications for osteoporosis and perhaps muscle stimulating medicines to prevent atrophy?

Submitted by ERDRCR t3_z9zbwi on December 1, 2022 at 8:50 PM

11 comments

What happens at a molecular level to soften food when it cooks? Why do things become harder when charred?

Submitted by Singhilarity t3_z5svr1 on November 27, 2022 at 5:38 AM

10 comments

How do we know the exact color of things?

Submitted by ItzzStrike t3_y2zkzn on October 13, 2022 at 2:03 PM

15 comments

How has COVID changed the way we study virus transmission?

Submitted by tigertoothdada t3_y22dh0 on October 12, 2022 at 12:17 PM

11 comments

How much does the size of an animal impact whether it is cold or warm Blooded?

Submitted by Xerrostron t3_xtuh86 on October 2, 2022 at 5:27 PM

12 comments

How do we know the purpose of small statues and figures?

Submitted by [deleted] t3_yc8wul on October 24, 2022 at 11:36 AM

13 comments

If cancer is caused by mutations in genes that regulate normal cell development/division, how does killing cancer cells prevent it from coming back?

Submitted by [deleted] t3_11gp6e7 on March 3, 2023 at 2:52 AM

10 comments