Does aliens exist? Why don't we see alien civilization? Mr. Li talks about Fermi's paradox
彭导分享
•
December 19, 2019
彭导分享
View ChannelAbout
一个典型的科学爱好者~ 个人博客：pdsharing.com
Latest Posts
Video Description
最近有一则新闻刷爆到互联网 说是加拿大的科学家发现了快速射电暴FRB的重复信号 有人就说这就是外星人向我们招手的 有小朋友问我说 外星人到底存在不存在 今天我们就来讨论一个有关外星人的话题 叫做费米悖论 详见视频…… 火热视频推荐 什么能源可以取之不尽？https://youtu.be/q-9wxg9tQRk 无穷大和无穷大+1谁更大？https://youtu.be/M2apWwvOqko 1+2+3+4+...=-1/12？https://youtu.be/T93SayXhw2w （英语）字幕制作者 : 俞映瑶（Yu Yingyao）
You May Also Like
Upgrade Your Everyday
AI-recommended products based on this video
Loading...
Amazon Echo Show 8 (newest model), With Spatial Audio, Smart Home Hub, and Alexa, Charcoal
(21,817)
149.99
PrimeFREE delivery Saturday, June 14
9K+ bought in past month
Loading...
Best Seller
Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, with Active Noise Cancellation, Adaptive Audio, Transparency Mode, Personalized Spatial Audio, USB-C Charging Case, Wireless Charging, H2 Chip
(26,751)
$118.98$114.22
FREE delivery Fri, Oct 17
10K+ bought in past month
Loading...
Wireless Earbuds, Bluetooth 5.4 Headphones, True Wireless Stereo Earphones with IPX7 Waterproof, Noise Cancelling Mic, Fast Charging and Comfort Fit Ear Buds for Sports/Workouts - Black
(1,741)
$19.99
FREE delivery Sun, Jun 22 on $35 of items shipped by Amazon
10K+ bought in past month
Loading...
Best Seller
Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, Personalized Spatial Audio, Sweat and Water Resistant, USB-C Charging Case, H2 Chip, Up to 30 Hours of Battery Life, Effortless Setup for iPhone
(23,152)
$89.99$83.69
FREE delivery Thu, Sep 4
10K+ bought in past month
Loading...
Apple AirPods Pro 2 Wireless Earbuds, Active Noise Cancellation, Hearing Aid Feature, Bluetooth Headphones, Transparency, Personalized Spatial Audio, High-Fidelity Sound, H2 Chip, USB-C Charging
(38,487)
$199.00$187.32
FREE delivery Fri, Oct 3
10K+ bought in past month
Loading...
Smart Watch for Men/Women, 1.95" AMOLED Fitness Tracker Watches with Bluetooth Calls/Flashlight/100+ Sport Modes Heart Rate/Sleep Monitor Ultra Lightweight Ultrathin Design
(0)
17.99
PrimeFREE delivery Saturday, June 14 on orders shipped by Amazon over $35
Loading...
Smart Watch for Men Women (Answer/Make Call), 1.96" HD Smartwatch Fitness Activity Tracker, 110+ Sports IP68 Waterproof, Heart Rate/Sleep Monitor/Pedometer/Calories, Fitness Watch for Android iOS
(550)
24.99
PrimeFREE delivery Saturday, June 14 on orders shipped by Amazon over $35
100+ bought in past month
Loading...
![Apple Watch Series 10 [GPS 46mm case] Smartwatch with Rose Gold Aluminium Case with Light Blush Sport Band - M/L. Fitness Tracker, ECG App, Always-On Retina Display, Water Resistant](https://m.media-amazon.com/images/I/61nNNMI1cFL._AC_UL960_FMwebp_QL65_.jpg)
Best Seller
Apple Watch Series 10 [GPS 46mm case] Smartwatch with Rose Gold Aluminium Case with Light Blush Sport Band - M/L. Fitness Tracker, ECG App, Always-On Retina Display, Water Resistant
(7,994)
$329.00$296.10
FREE delivery Thu, Jul 3
1K+ bought in past month
Loading...
![Apple Watch Series 10 [GPS 42mm case] Smartwatch with Jet Black Aluminium Case with Black Sport Band - S/M. Fitness Tracker, ECG App, Always-On Retina Display, Water Resistant](https://m.media-amazon.com/images/I/6105jZyXyPL._AC_UL960_FMwebp_QL65_.jpg)
Best Seller
Apple Watch Series 10 [GPS 42mm case] Smartwatch with Jet Black Aluminium Case with Black Sport Band - S/M. Fitness Tracker, ECG App, Always-On Retina Display, Water Resistant
(7,993)
$299.00$269.10
FREE delivery Thu, Jul 3
8K+ bought in past month
Loading...
Best Seller
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 6.0L Gas and 3.0L Diesel Engines
(117,789)
$99.95$75.43
FREE delivery Sun, Sep 21
30K+ bought in past month
Loading...
UGREEN Nexode Power Bank 20000mAh 130W Portable Charger 72Wh PD Fast Charging 3-Port USB C Battery Pack with TFT Smart Display for MacBook/iPad/iPhone 16/Samsung S24 and More
(1,903)
69.99
PrimeFREE delivery Saturday, June 14
500+ bought in past month
Loading...
ANKER 737 Power Bank, 24,000mAh 3-Port Laptop Portable Charger with 140W Fast Charging, Smart Display, for Outdoor Work, Compatible with iPhone 16/15/14 Series, Vision Pro, Samsung, MacBook, and More
(13,939)
109.99
FREE delivery Saturday, June 14
9K+ bought in past month
Loading...
VOLTME Portable Charger, Slim 10000mAh 5V/3A Power Bank, USB C in&Out High-Speed Charging Battery Pack, Travel Essentials Dual Output Compatible with iPhone 16 15 14 13 12 Samsung Google iPad etc
(51)
19.99
PrimeFREE delivery Saturday, June 14 on orders shipped by Amazon over $35
Loading...
Best Seller
Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, with Active Noise Cancellation, Adaptive Audio, Transparency Mode, Personalized Spatial Audio, USB-C Charging Case, Wireless Charging, H2 Chip
(26,751)
$118.98$114.22
FREE delivery Fri, Oct 17
10K+ bought in past month
Loading...
Best Seller
Apple AirPods 4 Wireless Earbuds, Bluetooth Headphones, Personalized Spatial Audio, Sweat and Water Resistant, USB-C Charging Case, H2 Chip, Up to 30 Hours of Battery Life, Effortless Setup for iPhone
(23,152)
$89.99$83.69
FREE delivery Thu, Sep 4
10K+ bought in past month
Loading...
Apple AirPods Pro 2 Wireless Earbuds, Active Noise Cancellation, Hearing Aid Feature, Bluetooth Headphones, Transparency, Personalized Spatial Audio, High-Fidelity Sound, H2 Chip, USB-C Charging
(38,487)
$199.00$187.32
FREE delivery Fri, Oct 3
10K+ bought in past month
Loading...
Bose QuietComfort Bluetooth Headphones, Wireless Headphones with Active Over Ear Noise Cancelling and Mic, Deep Bass, Up to 24 Hours of Playtime, White Smoke
(10,961)
249.00
FREE delivery Wednesday, June 11.
1K+ bought in past month
Loading...
Barnyard Designs Indoor Herb Garden Planter Set with Tray, Metal Windowsill Plant Pots with Drainage for Outdoor or Indoor Plants, Set/3 (Black)
(3,684)
26.95
PrimeFREE delivery Saturday, June 14 on orders shipped by Amazon over $35
100+ bought in past month
Loading...
Eye Contact Web Camera for Desktop Computer – 1080P USB Camera with Microphone & Stand, Center Cam for Laptop or Desktop, Manual Focus, Plug & Play for macOS & Windows（Black）
(96)
37.39
PrimeFREE delivery Saturday, June 14
100+ bought in past month
Loading...
![PEHAEL 3+3Pack for iPhone 17 Pro Max Privacy Screen Protector with Camera Lens Protector Full Coverage Anti-Spy Tempered Glass Film 9H Hardness Easy Installation Bubble Free [6.9 inch]](https://m.media-amazon.com/images/I/61PnVkv6KKL._AC_UL960_FMwebp_QL65_.jpg)
PEHAEL 3+3Pack for iPhone 17 Pro Max Privacy Screen Protector with Camera Lens Protector Full Coverage Anti-Spy Tempered Glass Film 9H Hardness Easy Installation Bubble Free [6.9 inch]
(151,641)
$7.99$6.39
FREE delivery Mon, Sep 29 on $35 of items shipped by Amazon
New on Amazon in past month
Loading...
![Ailun 3 Pack Screen Protector for iPhone 16 Pro Max [6.9 inch] + 3 Pack Camera Lens Protector with Installation Frame,Sensor Protection,Dynamic Island Compatible,Case Friendly Tempered Glass Film](https://m.media-amazon.com/images/I/815keamN-BL._AC_UL960_FMwebp_QL65_.jpg)
Ailun 3 Pack Screen Protector for iPhone 16 Pro Max [6.9 inch] + 3 Pack Camera Lens Protector with Installation Frame,Sensor Protection,Dynamic Island Compatible,Case Friendly Tempered Glass Film
(362,029)
$7.63
FREE delivery Wed, Aug 20 on $35 of items shipped by Amazon
10K+ bought in past month
Loading...
2025 AI Portable Fan Rechargeable, 4 Speeds 6600RPM Strong Airflow, Personal Waist Fan with up to 25H of Working Time, Hands-Free Hanging Neck Fan, Wearable Belt Fan for Camping, Outdoor, Jobsite
(1,636)
$19.98
FREE delivery Thu, Jul 3 on $35 of items shipped by Amazon
40K+ bought in past month