题型:阅读理解 题类: 难易度:普通
湖北省武汉市第二中2024届高三下学期5月模拟考英语试卷
Some people today might be early risers because of DNA they take after Neanderthals tens of thousands of years ago, suggests new research.
When early humans migrated from Africa to Eurasia roughly 70,000 years ago, some of them mated with Neanderthals, who had already adapted to the colder, darker climates of the north. The ripple (涟漪) effects of that intermating still exist today: Modern humans of non- African ancestry (血统) have between 1 and 4 percent Neanderthal DNA. Some of that DNA relates to sleep more specifically, the internal body clock known as the circadian rhythm.
For the new study, researchers compared DNA from today's humans and DNA from Neanderthal fossils (化石). In both groups, they found some of the same genetic variants involved with the circadian rhythm. And they found that modern humans who carry these variants also reported being early risers.
For Neanderthals, being "morning people" might not have been the real benefit of carrying these genes. Instead, scientists suggest, Neanderthals' DNA gave them faster, more flexible internal body clocks, which allowed them to adjust more easily to annual changes in daylight. This connection makes sense in the context of human history. When early humans moved north out of Africa, they would have experienced variable daylight hours--shorter days in the winter and longer days in the summer-for the first time. The Neanderthals' circadian rhythm genes likely helped early humans' offspring (后代) adapt to this new environment.
Notably, the findings do not prove that Neanderthal genes are responsible for the sleep habits of all early risers. Lots of different factors beyond genetics can contribute, including social and environmental influences. The study also only included DNA from a database called the U.K. Biobank-so the findings may not necessarily apply to all modern humans. Next, the research team hopes to study other genetic databases to see if the same link holds true for people of other ancestries. If the findings do apply more broadly, they may one day be useful for improving sleep in the modern world, where circadian rhythms are disturbed by night shifts and glowing smartphones.
Come and speak a week with us at Green and Gold Camp on the Sacramento Campus! Days are filled with scavenger hunts, river walks, the Challenge Center, water activities, arts and crafts, games and more! Your adventure begins at Sacramento State.
Awesome Activities:
Orienteering | Scavenger hunt |
Ropes course | Arts and crafts |
Cooking outdoors | Campus museums |
Fun in the sun | River walk |
Fun and educational games | Leave no trace principles |
Swimming |
Camps Dates and Details
Week 1: 6/1/2017-6/5/2017 | Week 2: 6/7/2017-6/11/2017 |
Week 2: 6/12/2017-6/16/2017 | Week 4: 6/19/2017-6/23/2017 |
Week 3: 6/26/2017-6/30/2017 | Week 6: 7/10/2017-7/14/2017 |
How much does this camp cost?
This camp is only $290 for an entire week of memories and friendships that will last a lifetime.
A minimum deposit of 50% per child, per camp is required for all registrations (non-refundable). Full payment is due 14 days prior to camp start.
When does the camp begin/end?
Drop-off for Green and Gold Camp begins each morning at 8:00 am. Camp activities begin at 8:30 each day and end at 5:00 pm. All children must be picked up no later than 5:00 pm. Late pick-ups will result in a $10 fee.
What does my child need to bring to the camp
Peak Adventures will provide a morning and afternoon snack, but your child needs to bring his/her own bag lunch every day. We also do water activities, so be sure to include a swim suit and a towel each day so they can participate. We suggest packing the following items each day:
T-shirt | Shorts | Sweatshirt |
Tennis shoes | Towel | Sunscreen |
Day pack | Water bottle | Lunch |
Sunglasses | Hat/Visor | Lip |
Swim-suit | Water shoes |
Camp must have a minimum of six campers for the program to run. No guarantees. You will receive a full refund for any cancelled camps.
CALL US AT 916-278-6321 FOR MORE INFORMATION AND TO RESERVE YOUR YOUTH CAMP SPOT TODAY.
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