Earth & Environmental Sciences
platinum group element
100%
crater
60%
drilling
53%
impact structure
53%
chondrite
45%
rock
44%
impactite
41%
extinction
35%
melt
35%
fossil record
31%
eukaryote
25%
material
23%
Cretaceous
23%
porosity
22%
lake
21%
flood basalt
19%
mass extinction
18%
asteroid
16%
Paleogene
15%
endosymbiont
15%
volcanism
14%
lithology
13%
transition
13%
common ancestry
13%
cell
13%
critical analysis
12%
program
12%
meteorite
12%
mitochondrion
12%
isotopic ratio
11%
contamination
11%
lacustrine deposit
10%
genomics
10%
terrestrial ecosystem
10%
chronology
9%
detection
9%
tektite
9%
osmium isotope
8%
fossil
7%
mantle
7%
achondrite
7%
young
7%
organism
7%
animal
7%
geochemical method
7%
method
6%
deep drilling
6%
bacterium
6%
geological time
6%
carbon
5%
impactor
5%
mafic rock
5%
condensation (process)
5%
project
5%
petrology
5%
siderophile element
5%
nickel
5%
assay
5%
mass spectrometry
5%
energy
5%
Physics & Astronomy
impact melts
82%
platinum
64%
projectiles
64%
chondrites
60%
Ghana
58%
rocks
46%
fossils
42%
craters
36%
eukaryotes
33%
signatures
21%
prokaryotes
17%
general overviews
15%
chronology
15%
lithology
15%
ecosystems
14%
drilling
14%
inductively coupled plasma mass spectrometry
14%
mitochondria
13%
meteorites
13%
tektites
11%
organisms
11%
cells
11%
bacteria
11%
contamination
11%
Earth mantle
11%
animals
10%
solar nebula
9%
extinction
8%
lakes
8%
refractories
7%
sediments
7%
rims
7%
carbon
7%
siderophile elements
6%
sulfides
6%
osmium isotopes
5%
achondrites
5%
nickel
5%