长颌乳齿象(属), 古乳齿象

ARI SHAPIRO, HOST: Artifacts found in Southern California have puzzled scientists for years. Some now say they are proof that humans lived in the area 130,000 years ago, well before anyone thought. That would make them the oldest evidence of humans i

发表于:2018-12-17 / 阅读(134) / 评论(0) 分类 2017年NPR美国国家公共电台4月

Some of this ice age dung was found beneath the skull in the Aucilla. The dung contained plant remains that tell us what the mastodon was browsing on 13,000 years ago or morea mixture of trees and grasses. This suggests that ice age Florida was drier

发表于:2018-12-27 / 阅读(139) / 评论(0) 分类 探索与发现2013年

It has long been thought that mammoths and mastodons rambled over North American subartic grounds between 75,000 and 10,000 years ago, and were made extinct by hungry new arrivals on the scene, human beings. But new evidence indicates mastodons proba

发表于:2019-01-20 / 阅读(122) / 评论(0) 分类 2015年Scientific American(二)月
学英语单词
-aneity
abbel
accentuated sound
acoustical pickup
al harmal
antoreinfusion
atmospheric gas burner
barrel-bag
bedin
beet leaf hopper
berceuses
biocalcirudite
blowout pit
cathode spray machine
cathode-ray receiving tube
census family
CNSG
codefest
colloid process
conical refining engine
controllable slip coupling
coplanar line vector
corriente
deadhead kilometres
derate
diffusion junction
direct blow mo(u)lding container
e-piracy
even the score
family Nephropsidae
fibre-optic faced tube
garglings
get sth out of sth
giant pulse holography
glass bead culture system
goodlisome
gun-battles
Gyachung Kang
hatcheted
have an a close eye on
high-energy ignition
hocused
Iris cathayensis
isopulegol acetate
Leadership in Energy and Environmental Design
leucopaxillus alboalutaceus
local battery signalling
longitudinal wheat brush
lunar volcanism
macaques
marketing domain
Matareca
mitigatest
multiple-decision process
Nakhodka
network simulation
non-ionic catalysis
Ombersley
one way restrictor valve
open coil annealing
optimal feedback control
output method
ozone-resistant rubbber
parentage diagnosis
pigeon lofts
polar-opposite
polymer variable condenser
Pseudoceratites
psychophysicist
Puerto Valdés
rail gage
ramanas
renegadoes
replacement-level
salafis
SAST
scarlet sulfonate
school tuna
serrated disk
service casing
sethen
small hole darning
sound cameras
span chisel
Spare-Tyre
spatially
sponge tent
sportsfests
stability against forcing out during train buckling
stabilizing annealing
stoneboats
sulcus habenularis
surface tillage
tacha
thin film hologram
thiotoluenes
Trumpism
turn-off gain
uncollectible accounts
visargas
water poppy
wien's law of radiation